Black Rainbow© Autoflower Cannabis Seeds

(Watermelon Zkittlez X Bacio Rainbow) X Apollo Black Cherry Auto

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Pack: 3
  • 1 Seed 14.50€
  • 3 Seeds 29.00€
  • 5 Seeds 43.50€
  • 25 Seeds 174.00€

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Life cycle: 11 weeks
Grow type: Indoor/Outdoor
Dominant: Indica
Yield: Big
THC: High (20 - 26%)
Flavor: Fruity
Effect: Relaxing
Experience: Intermediate
Life cycle: 11 weeks
Grow type: Indoor/Outdoor
Dominant: Indica
Yield: Big
THC: High (20 - 26%)
Flavor: Fruity
Effect: Relaxing
Experience: Intermediate

Black Rainbow© Autoflower seeds

The autoflowering version of Black Rainbow originates from the union of Watermelon Zkittlez X Bacio Rainbow. And after crossing this top-notch duo with Apollo Black Cherry Auto, the result is a non-photo-dependent hybrid destined to win your heart with her cocktail of sensations. This is one of the tastiest automatics from the catalogue of Seedstockers… A strain that will reward you with super frosty buds that are as dense and compact as golf balls. And they will hit your senses with an extremely citrusy aroma, sprinkled with beautiful notes of grape juice and fuel which then turn into spicy and earthy puffs, all bathed in a sweet and really Kushy aura. And all of this in a highly stable, compact, and easy-to-handle plant that will give you her best in just 11 weeks of life, as long as you treat her like a princess, making sure you provide her roots with plenty of space, prevent any kind of stress, and avoid low temperatures. If you were looking for a magical easy-to-grow plant that delivers incredible yields and can solve all your problems, then look no further… You’ve already found her!

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Details of Black Rainbow© Autoflower Cannabis Seeds

Life cycle 11 weeks
Grow type Indoor/Outdoor
Dominant Indica
Yield Big
THC High (20 - 26%)
Flavor Fruity
Effect Relaxing
Experience Intermediate

Let us invite you on a journey through lush valleys full of sensations with Black Rainbow Auto. This is a carefully bred gem that emerges from an impressive lineage to captivate you with her incredibly fruity aromatic profile… A promise of pleasure for your senses that is manifested in each of her resinous buds.

 

With an extremely quick flowering cycle, Black Rainbow Auto is a true revelation… A triumph of nature that delivers generous yields that are as irresistible as they are visually pleasing. Not only is this strain a feast for the senses but also a faithful companion for those moments of introspection or celebration. There’s no doubt this variety will stand tall as a symbol of innovation and heritage at the heart of cannabis culture, capturing the very essence of what makes this plant so incredibly special.

 

So, if you’re looking for a touch of magic to illuminate your grow, or for an ally for those moments of relaxation, then look no further. Planting Black Rainbow Auto seeds is like embracing an adventure that is full of colours, aromas, and flavours, all of which guarantee an unforgettable experience. Let yourself be seduced by this strain that will be sure to occupy a privileged place in both your heart and your garden.

What are Black Rainbow Auto cannabis seeds?

 

Black Rainbow Auto is a sensation among new-style autoflowering cannabis genetics. This potent hybrid combines the strength of Watermelon Zkittlez and Bacio Rainbow with the high adaptability of our Apollo Black Cherry Auto, resulting in a fast flowering feminised automatic that is extremely easy to handle and thrives under various growing conditions. If you’re familiar with the power of her parents, you’ll soon understand the greatness that this plant possesses.

 

Watermelon Zkittlez is an indica-dominant cannabis strain known for her intense flavours and pleasant effects. As you have probably already guessed, she derives from the cross of two current cannabis heavyweights (Watermelon and Zkittlez), and stands out for her high THC count of around 25 – 27%, meaning that she’s a pretty potent choice even for highly experienced users. Her flavours are a combination of sweet and fruity tones, with a predominance of watermelon that’s complemented by citrus notes with an occasional acidic touch that makes the experience quite refreshing and pleasurable.

 

And what can be said about Apollo Black Cherry Auto, one of Seedstockers’ best-selling autoflowers that produces dense and heavy buds with a high THC count (of up to 22%). Users appreciate her complex terpene profile, with deep cherry aromas and flavours combined with earthy and spicy notes reminiscent of the traditional Afghan hash. These sensory traits make Apollo Black Cherry Auto a popular option amongst cannabis aficionados who highly value both flavour and potency.

 

Therefore, Black Rainbow Auto's lineage is a testament to her creators' goal of providing a delicious sensory experience, which is reflected in her flavour, aroma, and effects. And the result of this three-way cross is an indica-dominant hybrid that embodies the strength and endurance of her namesakes. With her feminised and autoflowering nature, this is the ideal strain for growers looking for a smooth growing process, but without having to compromise on either quality or potency.

 

Characteristics of Black Rainbow Auto: Appearance and morphology

 

Black Rainbow Auto is a dense and vigorous plant with ample branching and remarkably large internodes. She grows pretty big for an auto, developing a structure that’s neither too tall nor too thin but which gives way to copious yields.

 

Her indica-leaning genetics are clearly shown as the plant matures. The buds produced by Black Rainbow Auto are a true wonder to behold thanks to their dense and resinous character, which leads to a bright and almost crystalline appearance, with a guaranteed dose of stickiness and psychoactivity. Bear in mind, though, that they are extremely sensitive to humidity, so it’s crucial to ensure proper ventilation during the drying process to preserve the integrity of these precious flowers.

 

Depending on the phenotype, these tight and compact buds appear in a variety of shades, from light to dark green, with vibrant orange pistils scattered everywhere, and with rather small sugar leaves, which definitely helps when it comes to the manicuring.

 

Aroma of Black Rainbow Autoflowering: A sweet but Skunky halo

 

This strain really shines when it comes to her scent. The first encounter after opening the jar welcomes you with an explosion of fruity aromas… A complex mixture of tropical and citrusy notes with a clearly sweet touch that makes this strain instantly recognisable. And then a second level reveals slightly more distinctive notes of berries and dried orange peel, providing a bittersweet character that intensifies when the flowers are ground, thanks also to more acidic fuel tones that converge in an overwhelmingly earthy and spicy feeling to create the classic hash aroma that the Skunk varieties are known for.

 

Flavour of Black Rainbow Auto: A waterfall of delicious nuances

 

Black Rainbow Auto is an outstanding strain that showcases a scrumptious terpene mix, including myrcene, limonene, caryophyllene, and pinene. These terpenes harmonise to create a fusion of flavours that will leave you wanting more. After the initial inhalation, you’ll discover a strong diesel touch that is quickly followed by a spicy hue that’s absolutely irresistible.

 

But her charm doesn’t stop there… An explosion of berries and fruits dances on your taste buds, reminiscent of the juiciest blackberries that you could imagine. This fruity touch is beautifully complemented by a subtle Kush flavour that adds depth to the overall experience… A taste explosion that takes your senses on an incredibly stimulating journey.

 

When burned in a pipe or joint, the flowers blaze with a very pleasant smoke that’s easy to inhale. On exhalation, this light smoke has a curiously woody aftertaste that remains in the mouth for quite some time… An effect that is much loved by veteran users with a taste for old-school flavours… No doubt they’ll make this variety one of their favourites!

 

How much THC does Black Rainbow Auto contain?

 

This strain’s THC levels range between 23 and 26%, so you could say she’s a highly potent option, but she’s still accessible to both average and highly experienced users. Although her CBD content is generally low, as typically happens with THC-dominant varieties, this cannabinoid still contributes to Black Rainbow Auto’s overall therapeutic effects, especially in terms of relaxation and pain relief. In addition, her moderate CBN levels and rich terpene concentration (including myrcene and limonene) make this strain a great choice for recreational use.

 

Black Rainbow Auto’s recreational effects

 

Although the magic appears relatively quickly after the first puff, the head effects tend to be subtle. At first, there may be a slight pressure around the eyes and temples. However, as smokers get used to this sensation, they can start to appreciate the action of this strain on their sensory perception. Experiences such as slight visual and auditory distortions are commonly reported, as well as a strange feeling of time passing more slowly. These mind-blowing effects can be intensified with atmospheric enhancements, particularly mood-setting music or a visually appealing television show.

 

At the same time as Black Rainbow Auto’s psychedelic adornments appear, users may also notice that their thoughts acquire a newly connected quality, with certain ideas that seem to occupy more space or attention than they would do normally. This type of cerebral energy can be a great way to work on detailed tasks, whether complicated or slightly more mundane, such as cleaning the house.

 

As the high advances, a notable bodily effect appears to supplement these mental activation effects. While this new relaxation is not likely to knock users out, it could undo any previous motivation to complete a long to-do list. Therefore, Black Rainbow Auto is best enjoyed in relaxed circumstances in these later stages. Due to the slow drop in energy levels, this weed is recommended for use between the end of the afternoon and the early hours of the night.

 

Medical effects of Black Rainbow Autoflowering

 

Black Rainbow Auto can also have various applications for medical cannabis patients. Certain mental properties specific to this strain can help with the concentration of those suffering from attention deficit disorders. As the body takes over, this strain can temporarily relieve symptoms of stress, depression, and anxiety. Physical benefits also include relief from both chronic pain and daily mild irritation.

 

Black Rainbow Auto can also lead to increased appetite, thereby helping those who may have lost it for whatever reason. However, because of her strong cerebral effects, patients prone to suffering from panic attacks or those with low tolerance to THC should use Black Rainbow Auto with some caution. Nonetheless, this is something that should always be taken into consideration when dealing with any variety with high tetrahydrocannabinol levels.

 

All in all, this strain is shown to be a perfect companion for social encounters, as well as an ally for awakening a long forgotten appetite… A balm to soften mood fluctuations… A light of hope against the shadows of depression… Or deep relief for the most persistent headaches.

What are the best ways to use Black Rainbow Auto?

 

Black Rainbow Auto’s consumption method may vary according to personal preference and desired effects. These are the most popular options:

 

Smoking: Either in a joint or pipe, this is the most traditional and rapid way to experience her effects. Black Rainbow Auto’s sweet and earthy flavour profile is particularly pleasant when smoked.

Vaping: This strain reaches her highest levels through vaping since her delicate terpenes are better preserved with this method. As there’s no combustion, you can enjoy her full flavour profile, which can be more pleasant and less irritating to the lungs.

Edibles: Her flavour can add delicious notes of orange peel and berries to several cannabis-infused products. This option leads to a more prolonged and potent experience which is ideal for those looking for longer lasting effects. However, it’s always extremely important to dose correctly as the effects can take some time to appear.

Concentrates: Black Rainbow Auto’s extracts (like oil, shatter, or wax) provide a more concentrated dose of THC and other cannabinoids, resulting in more intense and faster effects. But best to watch out if you’re not used to them!

 

How long does Black Rainbow Auto take to grow?

Due to her robustness and autoflowering nature, this variety stands out as one of the most attractive options for growers who don’t have any time to lose. Although she tends to be a little taller than standard automatic strains (with a height that ranges between 60 and 100 cm), she’s still ideal for reduced spaces as she maintains a controlled growth without spreading excessively, which makes handling a lot easier.

 

Black Rainbow Auto plants usually develop dense lateral foliage rather than height, which is essential to maximise production. With a full life cycle of about 11 weeks, her yield can be significant, especially if you use high-quality seeds like those from Seedstockers and apply flowering boosters correctly. Indoor growers can produce between 400 and 450 g/m2 using a 300 - 350W LED lighting system; whereas outdoor plants that reach greater heights typically produce 100 - 170 g per plant.

 

In addition, Black Rainbow Auto seeds ensure almost exclusively female plants, increasing the probability of an abundant harvest by eliminating the appearance of males. In terms of the quality of the weed, it’s important to consider that, besides genetics, the growing conditions also play a vital role. However, many autoflowering strains have won awards for their flavour, aroma, and effects, which proves that these plants can also produce top-notch marijuana. And no doubt our Black Rainbow Auto belongs in that exclusive group!

 

How long does Black Rainbow Auto take to flower?

Black Rainbow Auto’s autoflowering character eliminates the need for complex light cycles to induce the flowering, which further simplifies cultivation thanks to her ability to flower automatically after a certain period of time. In fact, these plants can flower in just 5 - 6 weeks, which means that growers can harvest several times per year. However, it is important to ensure that the plants receive enough light so they grow healthy, as lighting quality and quantity can affect the plants’ growth and performance.

 

Thus, Black Rainbow’s autoflowering cannabis seeds can grow and flower with just 12 hours of light per day, but we recommend 18/6 or 20/4 to obtain high yields. This means that growers can have greater control over the growing process and create an optimal environment for their plants without having to worry about the lighting time.

 

Everything you need to know about growing Black Rainbow Auto

Once you’ve gained a bit of experience, growing this cannabis strain will become infinitely easier. She doesn’t need much space, so she’s perfect for reduced grow rooms. She can also survive fluctuating temperatures and resist pests, which means you can plant outdoors without any problems.

 

The complacent attitude of this fruity variety means you can use either soil or hydroponics to obtain a successful harvest. Growers looking to enhance the flavour and fragrance of their buds tend to choose the first option. A mixture of coco coir and perlite works well with Black Rainbow’s auto seeds. Get rid of any presence of pests in the substrate and keep a close eye to make sure it is well aerated so that the roots can breathe easily.

 

Plant your cannabis seeds in an 11 - 20 litre pot from the very beginning to avoid having to transplant later and cause unnecessary stress. You can also use fabric pots to help aerate the roots. If you decide to grow Black Rainbow Auto in a hydroponic setup, make sure you keep track of the humidity levels, as any value higher than 50% will favour the appearance of mould, especially during the flowering.

 

And remember not to train or prune autoflowering plants, as these techniques will only ruin your yield. The only thing these plants need is a slight defoliation during the flowering to maintain sufficient ventilation around the lower foliage.

 

How to grow Black Rainbow seeds indoors

Indoors, you have total control of the environment. Keep the temperature around 20 - 25°C during the day and between 18 and 20°C at night. Humidity levels should be between 40 and 60% to avoid issues associated with mould and pests. Make sure you have a proper ventilation system to renew the air and keep the environment cool, with sufficient CO2 to promote growth.

 

Maximise the efficiency of your lights by placing the plants in a way that they all receive the same amount of light. Consider using reflectors to direct the light towards the plants and prevent dispersion. Adjust the height of the lights regularly to maintain optimal intensity without burning the plants. Also remember to space your plants to avoid excessive competition for light and nutrients. This is crucial for autoflowerings as they have such a short life cycle that they need all the possible advantages they can get to maximise their growth and flowering. Good air circulation is also crucial to prevent pests and promote healthy growth; and fresh air helps keep temperatures low and reduces humidity levels, which in turn decreases the risk of fungal problems.

 

You can also increase the yielding potential if you plant several Black Rainbow autoflowering seeds using Sea of Green, a training technique that is also a brilliant way to maximise space. Autoflowering plants are sensitive to stress, and due to their short life cycle, they don’t recover easily from disturbances. Therefore, avoid intense training techniques like Topping or Supercropping. Opt for less invasive methods such as LST (Low Stress Training), but only if necessary. This technique involves bending and tying the branches gently to improve light exposure without damaging the plant.

 

Where to grow Black Rainbow Auto outdoors

Black Rainbow Auto also performs incredibly well outdoors, especially in temperate or warm climates such as the Mediterranean. Although you can grow these seeds out in the open throughout the whole year, yields are significantly lower if the plants are exposed to less than 6 hours of direct sunlight per day. Weather that is too humid can also be problematic for Black Rainbow Auto’s dense buds, which can be susceptible to mould when the first autumn rains arrive.

 

It is therefore crucial to choose the right time to plant, preferably in spring or early summer, when temperatures are warmer and the daylight hours are longer. With the power of the sun at its maximum, growth can be fully maximised.

 

Although Black Rainbow is an incredibly hardy autoflower, she’s not immune to pests and diseases. Use organic methods, such as essential oils or insecticide soap, to combat these annoying guests. In regions where the climate can be extreme (with a risk of high heat or late frosts), consider using portable covers or greenhouses to protect your plants.

 

But if you want to grow Black Rainbow Auto outdoors with a bit more flexibility, then consider using pots instead. This will let you move the plants to take advantage of the best sunlight conditions during the day, or to protect them from adverse weather conditions such as storms or hail.

 

Five top tips to maximise yielding capacity and potency

Watering: It should be moderate but consistent. Black Rainbow Auto doesn’t require large amounts of water at the beginning of her life cycle, but it’s important to ensure that the soil never dries out completely. As the plant grows and starts flowering, you can increase the amount slightly.

 

Feeding and nutrients: Black Rainbow Auto benefits from a balanced nutrient plan that promotes both vegetative growth and flowering. Less is always more, and considering her autoflowering character, it’s vital to avoid overfeeding. Start with a more diluted nutrient solution to avoid this. As the plant matures, adjust the nutrients to support the flowering, increasing the levels of phosphorus and potassium and reducing the level of nitrogen.

 

pH levels: The pH levels of the substrate are also important and should be kept between 6.0 and 7.0 for best results. Adding a little compost or mulch is highly beneficial, both to facilitate drainage and aeration and to provide all the extra nutrients that are needed.

 

Night temperature: If you grow indoors, try to reduce the night temperature to create a contrast with the day temperature. This helps to simulate the natural environment, which can help improve the production of terpenes and cannabinoids, enhancing the aroma and strength of the flowers. A difference of 5 to 10 degrees is usually adequate.

 

Regular monitoring: Given that Black Rainbow Auto has a fast life cycle, it is vital to regularly check the plants to detect any signs of stress, nutrient deficiency, or symptoms of disease. Early intervention can make all the difference between a successful harvest or a complete failure.

 

When to harvest Black Rainbow Auto

 

One way to determine whether Black Rainbow Auto is ready for harvest is to look at the trichomes with a magnifying glass. Trichomes are the small structures that look like crystals or dewdrops on the nearby flowers and leaves. When most trichomes are milky white, and some start to turn amber, then it’s a good time to harvest. This ensures the highest THC levels and the maximum expression of the strain’s aromatic profile.

 

Stigmas (those little ‘hairs’ that protrude from the flowers) are also indicative of the best time to cut. When around 70 - 80% of these stigmas shrink towards the pistils and change from white to an orange or reddish colour, this indicates that the plant is close to its optimum harvest point.

 

As with any other cannabis strain, the harvest of Black Rainbow Auto must be done with care to preserve the quality and potency of the flowers. Therefore:

 

Preparation: Make sure your tools (such as your scissors) are clean and disinfected to prevent the introduction of pathogens into the plants.

Cutting: Cut full branches or remove the flowers from the branches. Some growers prefer to cut the whole plant at the base, whereas others cut individual branches.

Manicuring: Remove the fan leaves and then the smaller leaves that don’t have any trichomes to perform a more efficient drying process and thereby obtain a higher quality final product.

Drying and curing: Hang the branches or flowers in a dark, ventilated place with controlled humidity levels so they dry slowly. After the drying, place the flowers in airtight containers, such as glass jars, and open them regularly to burp them and allow the cannabis to cure to improve its flavour, aroma, and potency.

 

Buy Black Rainbow Auto seeds at the best price at Seedstockers

 

Black Rainbow Auto stands as a testament to the art of cannabis and offers the perfect combination of great taste, easy cultivation, and pleasant effects. Whether you’re a rookie grower or a seasoned pro, this strain promises great satisfaction and a huge amount of sweet and potent buds.

 

She exhibits all the best traits of her ancestors, with dense flowers and a mesmerising aroma. And with surprising speed from seed to harvest, this variety offers generous rewards with minimal effort, allowing you to enjoy one of the most sublime and appreciated experiences in the world of cannabis.

 

If you still haven’t explored this gem, Black Rainbow Auto is presented as the ideal choice to further enrich any self-respecting strain collection… An essential piece for those who want to experience the pinnacle of cannabis quality.

 

And now you can get hold of this beauty from the comfort of your own home: you simply need to buy Black Rainbow Auto seeds by Seedstockers to obtain a champion strain at the best price on the market. Choose from several different formats, ranging from 1 to 25 seeds, and discover firsthand everything that this great plant has to offer!

 

 

 

 

 

 

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DID YOU ENJOY YOUR EXPERIENCE WITH THIS VARIETY? LET US KNOW

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Autoking
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07/04/2025
Productive Zkittlez Strain!

Loved growing this one and clearly has a Zkittlez taste, very nice strain team Seedstockers!!!

Doobie the squirrel
Staff

Thanks a lot Autoking!