Magma

Magma Feminized Cannabis Seeds by CBD Seeds

Magma is a feminized cannabis seed from CBD Seeds that stacks three heavyweight genetics — White Widow, Skunk, and Critical — into a single fast-flowering, heavy-yielding plant. With only 8 weeks of bloom time and a reputation for producing dense, trichome-coated buds with a pronounced citrus flavour, this is a strain built for growers who want serious output without a long wait. Bred with the medicinal user in mind, Magma delivers a strong sedative effect that CBD Seeds developed specifically for therapeutic applications.

Why Magma Feminized Seeds Stand Out

Three-way crosses aren't unusual in cannabis breeding, but the specific combination here is worth paying attention to. CBD Seeds started with a White Widow x Skunk cross — that gives you the resin production and vigour you'd expect from two of the most proven genetics in the catalogue. They then crossed that offspring with their own Critical line, which is where the yield explosion comes from. Critical genetics are famous for producing oversized colas that can genuinely test the structural limits of a branch.

The result is a plant that grows like it's in a hurry. Eight weeks from the flip to 12/12 and you're looking at harvest-ready buds — dark green, absolutely caked in trichomes, and giving off a sweet, almost candy-like aroma during the final weeks. The dried product carries a distinct citrus taste that lingers. It's not subtle. If you've grown Critical crosses before, you'll recognise that dense bud structure, but the White Widow parentage adds a frostiness that pure Critical lines sometimes lack.

One honest note: because this strain responds so aggressively to nutrients, it's easy to overfeed. We've seen growers push the EC too high in week 4-5 of flower and end up with nutrient burn on the sugar leaves. Start at around 70% of your usual feed strength and work up. The plant will tell you when it wants more — and it will want more.

Magma Seed Variant and What You Get

Why Magma Feminized Seeds Deserve a Spot in Your Grow Room

Speed matters. Not every grower has the patience — or the electricity budget — for a 10-12 week flowering strain. Magma wraps up in 8 weeks flat, and it doesn't sacrifice yield to get there. The Critical genetics in its lineage are responsible for that. Critical is one of the highest-yielding commercial strains ever developed, and that trait carries through strongly in this cross. You're not choosing between fast and productive — you're getting both.

The sedative effect profile is the other reason to look at this strain. CBD Seeds bred Magma specifically for medicinal users, and the heavy, body-focused effect reflects that intention. This isn't a "get things done" daytime strain. It's an evening smoke — the kind that pins you to the sofa and quiets everything down. If you've grown White Widow before, imagine that same resinous potency but with a heavier physical component courtesy of the Critical and Skunk genetics.

Compared to running a straight Critical, Magma brings more resin and a more complex terpene profile. Compared to White Widow, it yields more and finishes faster. It sits in a sweet spot between the two — and the Skunk backbone gives it a resilience during veg that newer, more finicky genetics sometimes lack. We'd pick Magma over a pure Critical for anyone growing in a smaller space who still wants weight at harvest, because the White Widow influence keeps the stretch more manageable.

How to Grow Magma Feminized Cannabis Seeds

1. Germinate your Magma seeds using the paper towel method or directly in a starter plug. Keep the temperature between 22-26°C and expect taproots within 24-72 hours.
2. Transplant seedlings into their final containers once the first true leaves appear. Magma responds well to both soil and coco coir — in coco, you'll see faster vegetative growth but need to feed more frequently.
3. Vegetate for 3-4 weeks under 18/6 lighting. Magma grows vigorously, so consider topping or low-stress training (LST) during veg to create an even canopy and maximise light penetration.
4. Flip to 12/12 lighting to trigger flowering. The first pistils should appear within 7-10 days of the switch.
5. Feed progressively through flower, starting at roughly 70% of your nutrient line's recommended strength. Magma is a hungry plant — increase gradually through weeks 3-6 of flower, then begin your flush in week 7.
6. Watch for heavy colas bending branches in the final 2 weeks. Support with plant yo-yos or bamboo stakes. The Critical genetics produce dense, weighty buds that can snap unsupported branches.
7. Harvest at 8 weeks of flower. Check trichomes with a magnifier — you're looking for mostly cloudy with 10-20% amber for that sedative effect Magma is known for.
8. Dry in a dark room at 18-20°C with 55-60% humidity for 10-14 days, then cure in glass jars for at least 2 weeks. The citrus terpenes really develop during a proper cure.