Ultra White Amnesia

Ultra White Amnesia Cannabis Seeds

Ultra White Amnesia is a sativa-dominant feminised cannabis seed from Ministry of Cannabis that crosses two of the most celebrated genetics in the game — White Widow and Amnesia Haze. The result is a 75% sativa hybrid that finishes flowering in just 9 weeks, packs 22% THC, and produces dense, resinous columns of bud that can snap branches if you're not careful. Five feminised seeds per pack.

Why Ultra White Amnesia Seeds Stand Out

Most sativa-dominant strains make you wait — 11 weeks, 12 weeks, sometimes longer before you can even think about chopping. Ultra White Amnesia finishes in 9 weeks of flower, which is fast for a 75% sativa. That alone makes her worth a look if you want sativa effects without sativa patience.

The genetics here are no mystery. White Widow brings the resin production and physical weight — the kind of trichome coverage that makes buds look frosted even before you cure them. Amnesia Haze brings the cerebral, uplifting, social side. Ministry of Cannabis crossed them to get a plant that does both: thick, sticky buds with a head-led effect and a THC content that sits at 22% when properly cured. That's not a number to take lightly.

One thing we'd flag: this strain is a hungry plant. She eats through nutrients faster than most varieties we've seen, so you'll want to feed generously during veg and flower. But — and this is critical — flush her for the last 2 weeks before harvest. Skip the flush and you'll taste it. The flavour and aroma of Ultra White Amnesia are a big part of the appeal, and nutrient residue will flatten that right out.

Ultra White Amnesia Growing Specifications

How to Grow Ultra White Amnesia Seeds

Ultra White Amnesia adapts well to any growing method — indoor tent, outdoor garden, greenhouse, soil, coco, hydro. She's not fussy about setup, which makes her a solid pick if you're still figuring out your preferred method. That said, she does have a few traits you'll want to plan around.

1. Germinate your feminised seeds using the paper towel method or directly in a starter plug. Keep temperatures between 22-25°C and expect taproots within 24-72 hours.
2. Transplant into your chosen medium once the taproot is 1-2cm long. If growing indoors, 9 plants per square metre works well — flip them to flower after a maximum of 20 days of vegetative growth. Let them veg any longer and they'll outgrow most tents, given the sativa stretch.
3. Feed generously throughout vegetative and flowering stages. Ultra White Amnesia is a heavy feeder and responds well to a full nutrient schedule. She'll show deficiencies faster than average if you're stingy with the feed.
4. Begin flushing with plain pH-balanced water 2 weeks before your planned harvest date. This is non-negotiable if you want the full flavour profile to come through.
5. Watch the branches during late flower. The columnar buds get extremely dense and heavy — packed tight with resin and speckled with lime-green and orange stigmas. Support stakes or a trellis net will save you from snapped branches in the final weeks.
6. Harvest at 9 weeks of flowering. Check trichomes with a loupe — you're looking for mostly milky with a few amber heads for the best balance of potency and flavour.

What to Expect from Ultra White Amnesia

At 22% THC, Ultra White Amnesia is not a casual smoke. The sativa dominance means the effect leans cerebral and social — the Amnesia side of the family tree is doing the heavy lifting there. The White Widow genetics add a physical layer that takes the edge off without pulling you into the sofa. It's a combination that works well for experienced users who know their tolerance.

Novices should approach with genuine caution. According to research published in PMC, individual responses to cannabinoids vary significantly, and higher-THC strains can cause adverse reactions including anxiety and panic in some users (An Individuality of Response to Cannabinoids, PMC, 2023). If you're growing this for personal use and you're not a seasoned consumer, start small and give yourself time to gauge the effect before going back for more.

The aroma and flavour are where this strain really earns its keep — provided you've flushed properly. Expect a complex, pungent nose with that classic Haze sharpness layered over something sweeter and earthier from the Widow side. When you crack a cured bud open, the resin practically sticks to your fingers. That's the kind of trichome density you get from White Widow genetics meeting a 9-week flowering window.

Ultra White Amnesia vs Other Ministry of Cannabis Seeds

If you're browsing the Ministry of Cannabis catalogue and wondering where Ultra White Amnesia fits, here's the honest breakdown. Compared to their Chronic Haze, Ultra White Amnesia delivers higher THC (22% vs typically 18-20%) and a faster finish. Compared to their more indica-leaning strains, she stretches more and needs branch support, but rewards you with substantially larger outdoor yields — up to 500g per plant is serious weight.

The one honest limitation: she's not a set-and-forget plant. That heavy feeding requirement means you need to stay on top of your nutrient schedule. If you're the type who waters once a week and hopes for the best, you'll get mediocre results. Give her what she wants, though, and she'll fill your jars.