How to Grow Crystal
Crystal is a frosty, award-winning indica that lives up to its name, coating its buds in a thick blanket of resin. It pairs a potent 21–25% THC with a clean earthy, pine flavour and a happy, relaxed, talkative effect, on a sturdy, productive plant that stays easy to manage.
Built from Northern Light crossed with White Widow, this is a 70% indica, 30% sativa strain with two of the most celebrated resin producers in its background. The result is a glittering, high-THC plant with dense buds, a crisp aroma and a well-rounded, feel-good high.
Recommended Strains
Crystal
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THC | 21% - 25% (High) |
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Type | Feminized |
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Yield | High |
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Phenotype | 70% Indica / 30% Sativa |
24K Gold Regular
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THC | 19% - 22% (Medium) |
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Type | Regular |
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Yield | High |
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Phenotype | 60% Indica / 40% Sativa |
Because it is sturdy, generous and forgiving, Crystal is a rewarding pick at any level. You can see the full genetics and buy Crystal feminized seeds on the strain page, and browse more of our feminized range alongside it.
Strain Profile at a Glance
| THC | 21–25% (high) |
|---|---|
| Lineage | Northern Light x White Widow |
| Type | Feminized |
| Award | Winner, Spannabis 2017 |
| Genetics | 70% Indica / 30% Sativa |
| Climate | Temperate |
| Flowering time | 8–10 weeks |
| Harvest | October |
| Height | 4.92 ft / 1.5 m |
| Yield | High |
| Yield indoor | 1.31–1.64 oz/ft² (400–500 g/m²) |
| Yield outdoor | 17.64 oz/plant (500 g/plant) |
| Grow difficulty | Beginner-friendly |
| Flavors | Earthy, Pine |
| Effects | Happy, Relaxed, Talkative |
Promos & Deals
An Award-Winning Strain
Crystal is not just a pretty name. It took home a win at Spannabis 2017, one of the most competitive cannabis events in Europe, where it stood out for its heavy resin and clean, well-balanced profile. That recognition says a lot about how consistent and rewarding the plant is in the garden.
For a grower, an award like this is a useful signal: it points to stable genetics, a reliable finish and a quality of bud that has been judged against strong company. You can find it alongside our other award-winning cannabis seeds if you want more proven performers.
Climate and Where to Grow It
Crystal does well in a temperate climate with mild, steady conditions and plenty of light. It is a tough, adaptable plant that performs both outdoors and in a controlled indoor tent, settling at a moderate 1.5 m that suits most spaces.
Outdoors it finishes around October, with a single plant bringing in a generous 500 g in a good spot. Indoors it produces a strong 400–500 g/m². Keep humidity in check as the dense, resin-coated buds fill in, since tight indica flowers can trap moisture and are worth protecting from bud rot.
Indoors, aim for daytime temperatures around 68–80°F (20–27°C) and keep steady airflow moving through the canopy. Its even, medium height makes it an easy fit for a standard tent without heavy training.
Growing Feminized Photoperiod Seeds
As a feminized strain, every seed grows into a flowering female, so there is no need to sex the plants or remove males. That keeps the grow simple and means no wasted time or space on plants you would only cull later.
Being a photoperiod plant, Crystal flowers on a light change rather than on age. Grow it under a long day (around 18 hours of light) through the vegetative stage, then switch to a 12/12 cycle to trigger flowering. A longer veg builds a bigger frame and a bigger harvest, while a shorter veg keeps the plant smaller and tidier for a compact space.
Feeding Schedule (EC Guide)
This is a vigorous, productive plant, so you can feed it steadily through bloom to support the heavy, resinous buds. Start low, build up as the plant asks for more, and taper off for the final flush so the earthy, piney flavour stays clean.
| Stage | EC (mS/cm) | Notes |
|---|---|---|
| Seedling | 0.4–0.6 | Very light feed, focus on healthy root growth |
| Vegetative growth | 0.8–1.2 | Build the frame, raise nitrogen gradually |
| Early flower | 1.2–1.4 | Shift toward bloom nutrients (P and K) |
| Full flower | 1.4–1.6 | Peak bloom feed while the heavy buds swell |
| Flush | 0.0–0.4 | Plain water for the final 1–2 weeks |
Flowering and Harvest
Once you flip to 12/12, bloom runs about 8–10 weeks. The indica dominance shows in the structure: compact internodes, dense, resin-coated buds and a decisive bud set rather than long, stretchy branches, which keeps the plant stout and heavy-topped.
This is a productive plant that carries real weight on its colas, so keep the canopy open and support the heavier branches if they start to lean. Harvest when most trichomes have turned cloudy with a few amber heads for the fullest expression, and run a short plain-water flush in the last week or two before you cut.
Drying and Curing
Dry whole plants or branches in a dark room at around 60°F (15–18°C) and 55–60% humidity for 7–14 days, until the thin stems snap rather than bend. A slow, even dry stops the dense buds staying damp in the middle while the outside dries out, which protects both the crisp aroma and the heavy resin.
Then cure the trimmed buds in sealed jars, burping them daily for the first week and letting them settle for three to four weeks. A proper cure brings the piney freshness forward over the earthy base and smooths the smoke, which is exactly what this frosty, prize-winning cross deserves.
What to Do With Your Trim
Don’t bin the sugar leaves you remove while manicuring. Crystal is famously frosty and high in THC, so the trim is excellent for dry sift, bubble hash or rosin, giving you a bonus run of potent concentrate from material most growers throw away.
Flavor and Terpenes
Crystal has a clean, grounded flavour of damp earth lifted by fresh pine, the crisp and classic profile you expect from its Northern Light and White Widow roots. It is a simple, well-defined taste rather than a sweet or fruity one, which is part of its old-school appeal.
It carries a broad terpene stack, and the ones that shape the flavour stand out clearly. Pinene drives the fresh, resinous pine note; myrcene anchors the earthy, musky base; humulene adds a woody, earthy depth; caryophyllene brings a peppery warmth; borneol grounds it with an earthy, camphor-like touch; and eucalyptol adds a cool, fresh lift. A supporting cast of phellandrene, phytol and valencene fills in the herbal corners.
Effects and Best Use
With its 70% indica base, Crystal is reported as happy, relaxed and talkative, a warm, sociable character that pairs an easy lift in mood with gentle physical ease. It is a well-rounded profile that works as comfortably in company as it does winding down at the end of the day.
At a potent 21–25% THC it hits hard, so a little goes a long way, especially for less experienced users. That strength, the manageable size, the strong yield and the clean earthy-pine flavour are exactly why this strain has a trophy to its name.
Common Problems and Pro Tips
Crystal is a sturdy, forgiving grow, but it is a frosty, heavy-topped indica, so support and humidity come first.
- Support the heavy tops: it stacks dense, resin-caked colas, so the main branches carry real weight late in bloom and benefit from staking or tying.
- Watch the humidity: as a 70% indica the frosty buds are dense and trap moisture, so keep humidity down and run a fan to prevent bud rot.
- Open up the canopy: defoliate lightly to get light and air to the lower buds so the whole plant ripens evenly and stays free of mold.
Expert tip: Crystal is built on resin, so the sugar-leaf trim presses into good hash. Save it at harvest, and a slow cure brings out its clean earthy, pine character.
Frequently Asked Questions
Is Crystal indica or sativa?
It is indica-dominant, at 70% indica and 30% sativa, which shows in its relaxed, body-forward effect and its compact, heavy-topped structure. That indica lean also gives dense, resin-caked colas, so plan to support the main branches and keep air moving through the canopy as it fills out.
What award did Crystal win?
Crystal was a winner at Spannabis 2017, a major European cannabis event, recognised for its heavy resin and clean, balanced profile. That pedigree is a big part of why it stays a reliable, frosty choice, and it reflects how stable and true to type the plant grows out.
How long does it take to flower?
About 8 to 10 weeks once you switch to a 12/12 light cycle, with outdoor plants finishing around October. Its dense, frosty buds benefit from good airflow through that window, so keep a fan moving air across the canopy and start checking trichomes toward the end to catch your preferred ripeness.
Do I need to sex the plants?
No. These are feminized seeds, so every plant grows into a flowering female. There is no need to identify or remove males, which keeps the grow simple and makes better use of your space, since every seed you plant turns into a productive, resin-heavy plant rather than a male to cull.
Is Crystal good for beginners?
Yes. It is sturdy, forgiving and a moderate height, which makes it beginner-friendly. Keep the canopy open with a light defoliation and manage humidity in bloom, since the dense, frosty buds can trap moisture, and it is straightforward. Supporting the heavy tops late in flower is the other main job.
What does Crystal taste like?
Expect a clean mix of damp earth and fresh pine, driven by its pinene, myrcene, humulene and caryophyllene terpenes rather than any sweet or fruity note. Dry slowly in a cool, dark space and cure in jars so that crisp, resinous earth-and-pine character comes through at its best.
