LSD Strain Review: THC, Effects, Flowering Time & Yield

LSD Autoflower is an original QCS strain: a feminized, 50/50 hybrid that QCS lists at 24% THC, with 55 to 65 days of flowering, about 12 to 13 weeks from seed to harvest and up to 500 g/m² indoors. This LSD strain review covers our own specs and what growers generally report about the LSD family, so you can decide if it belongs in your garden.

LSD strain at a glance

What is the LSD strain?

LSD Autoflower is an original QCS strain: Quebec Cannabis Seeds is its original breeder, and these are our own genetics, bred in Quebec since 2015 by a grower with more than 35 years of experience.

The LSD strain is a famous name in cannabis, usually described as a cross of Mazar and Skunk, and often said to be named for its dreamy, almost psychedelic feel. The QCS version, LSD Autoflower, takes that profile and crosses it with Ruderalis, so the plant flowers on its own clock instead of waiting for shorter days. The result is a short, compact, balanced hybrid that finishes on its own schedule and never needs a change in light hours.

QCS describes the plant as staying short and compact, which suits tents, closets and balconies, and as having dense buds with a bright, citrusy flavour. It was bred in Quebec by QCS as a balanced hybrid.

A note before you search around: many seed companies sell a strain called LSD, and each uses its own breeding. Some list a photoperiod LSD as mostly indica, while the QCS autoflower is a 50/50 hybrid. Lineages, THC figures, genetic balance and flowering times you read elsewhere may describe a different cross. The numbers on this page are for the QCS version only.

Is LSD indica or sativa?

QCS lists LSD Autoflower as a 50% indica, 50% sativa hybrid. Neither side wins. In the garden, the plant stays short and compact, so the balance shows more in the effect than in the shape. If you want to understand what each side of the family contributes, our guide to what indica does to you is a good place to start.

Smell and flavour: lemon-lime, earth and flowers

QCS lists the taste as citrus, earthy and floral. The product page describes it as bright lemon-lime over a loamy, slightly chestnut-like base, which is a lovely and unusual way to put it. Elsewhere on the web, people who have tried LSD cuts mention earthy, lemon and sour notes, plus pine, hash and skunk, so the earthy-citrus backbone is consistent.

Terpene expression depends on light, temperature, drying and curing. Dense buds benefit from good airflow in late flower and a slow dry, which helps the citrus stay bright.

LSD effects

QCS describes the effect as uplifting and cerebral, with deep relaxation, and notes that the CBD softens the high. That is consistent with what consumers commonly report from LSD-family strains: a euphoric, mentally active start and a heavier, body-centred landing. Some consumers describe the heavier side as strongly relaxing, and many prefer it in the evening.

The strain is still strong, and QCS advises beginners to start small. Effects vary from person to person and with the dose, and dry mouth and dry eyes are commonly reported downsides.

How strong is LSD? THC and CBD content

QCS lists LSD Autoflower at 24% THC and 3 to 10% CBD. That is a strong figure with a meaningful CBD contribution for a high-THC plant, which is part of why QCS says the high is softened. As always, THC and CBD depend on how the plant is grown, dried and cured. If you want to go higher still, see our seeds over 25% THC.

Growing LSD Autoflower: flowering time and yield

Indoors, expect 55 to 65 days of flowering, which QCS puts at about 12 to 13 weeks from seed to harvest, and a yield of up to 500 g/m². Outdoors, QCS suggests starting plants indoors in late April, moving them outside in mid-May and harvesting in late July or August, with up to 450 g per plant possible. That is early compared to most photoperiod plants, which makes it a handy choice for short seasons.

QCS's growing advice is clear. Start in the final container, because transplanting stresses autoflowers. Skip topping and use low-stress training, which is gentle bending, instead. Give it 18 to 20 hours of light indoors, a large pot and full sun outdoors, and good airflow late in flower because the buds are dense. Harvest by checking trichomes rather than counting days.

What customers report

LSD Autoflower does not have any customer reviews on our site yet, so we will not invent any. The specs on this page come from QCS's own information. If you grow it, tell us how it went; a review helps the next grower.

Elsewhere on the web, growers of LSD-family plants commonly report compact, resinous plants, earthy-lemon smells and a mix of cerebral and heavy effects. Those are general reports about the family, not promises for this autoflower.

Is LSD right for you?

Choose LSD Autoflower if you want a short, compact, balanced hybrid with 24% THC, a lemon-lime profile and a softened but still strong effect, and you want a plant that does not need a light schedule. It suits balconies, tents and short-season growers. For a much stronger autoflower, read our review of Fat Bastard Autoflower.

See more in our autoflower seeds range or browse seeds over 25% THC.

LSD: frequently asked questions

A note on the numbers in this article: harvest dates, flowering times and yields are ranges, not promises. They vary depending on growing conditions: the grower, the method and the season's weather. No strain is 100% mold resistant. How we set these numbers →

View LSD seeds →