G13 x Skunk

G13 x Skunk Cannabis Seeds by Mr. Nice

G13 x Skunk is a predominantly Indica cannabis seed variety from Mr. Nice that delivers 500–650g/m² from a compact, manageable plant. Born from the crossing of the legendary G13 clone with a reliable Skunk, these regular seeds preserve genetics that were on the verge of disappearing — and they do it in a package that even first-time growers can handle with confidence.

Why G13 x Skunk Seeds Deserve a Spot in Your Garden

The story behind this strain is worth knowing. The original G13 was a female-only clone — no male counterpart, no way to breed it forward. As that clone aged, it started losing vigour. Mr. Nice had the foresight to cross it with a Skunk while the G13 still had life in it, partially preserving those coveted genetics in seed form. What you get is a stable, regular seed line that carries the G13's dense bud structure and the Skunk's growing resilience.

We've been stocking Mr. Nice seeds since the early days of the shop, and there's a reason they keep coming back to the catalogue. Shantibaba and Neville's Haze — the people behind Mr. Nice — are responsible for some of the most important breeding work in cannabis history. This isn't hype genetics from a new label; it's old-school Dutch breeding with a proven track record.

The Indica dominance means G13 x Skunk stays short. If you're working with limited vertical space — a tent, a low greenhouse, a balcony setup — this plant won't fight you for headroom. It channels its energy sideways and into bud production instead. The trade-off? Those buds pack incredibly tight. Rock-hard nugs that look fantastic but need watching during the final weeks of flower. More on that below.

G13 x Skunk Growing Specs and Yield

Here's what you're working with when you pop these seeds. The numbers come straight from Mr. Nice's breeding data, and they hold up well in practice.

That 500–650g/m² figure is genuinely impressive for a plant this compact. Most short Indicas top out around 400–450g/m², so G13 x Skunk punches well above its height class. If you're growing commercially or just want maximum return from a small footprint, this is the strain to consider over taller, stretchier alternatives like a pure Haze.

How to Grow G13 x Skunk Seeds

G13 x Skunk thrives indoors, outdoors, and in greenhouses — it's genuinely versatile. The Indica structure makes it forgiving for newer growers, and the Skunk parentage adds a layer of pest and stress resistance that more finicky genetics lack. Here's a practical growing guide.

1. Germination: Use the paper towel method or soak seeds in water for 12–24 hours until taproots emerge. These are regular seeds, so expect roughly a 50/50 male-to-female ratio from your pack of 15.
2. Sexing: Because these are regular (not feminised) seeds, you'll need to identify and remove males once pre-flowers appear — typically in the first 1–2 weeks of the 12/12 light cycle. Keep males if you want to breed; cull them if you're growing for flower.
3. Vegetative phase: The plant doesn't stretch much, so you can veg for 4–6 weeks without worrying about height. An 18/6 light schedule works well. Consider topping or LST (low-stress training) to open up the canopy — those dense buds need airflow.
4. Flowering: Switch to 12/12 and expect 7–9 weeks to harvest. Some phenotypes run to 10 weeks. Watch trichome colour with a loupe: milky trichomes with 10–20% amber is the standard harvest window for Indica-dominant plants.
5. Environment: Keep relative humidity below 50% during late flower. This is critical with G13 x Skunk — the buds are extremely dense and compact, which creates pockets where moisture gets trapped. A good oscillating fan pointed at the canopy makes a real difference.
6. Harvest and dry: Cut, trim, and hang in a dark room at 18–20°C with 55–60% humidity. Slow-dry for 7–10 days, then cure in jars for at least 2 weeks.

The Mould Problem — An Honest Warning About G13 x Skunk

Here's the one thing you absolutely need to know: G13 x Skunk produces very densely packed buds, and dense buds are a magnet for mould. Botrytis (bud rot) can destroy a cola from the inside out, and you won't always spot it until you break the bud open and find grey fuzz at the core.

This isn't a flaw unique to G13 x Skunk — any strain with rock-hard nugs carries this risk. But it's more pronounced here than with, say, a loose-structured Sativa. Monitor closely during the last 2–3 weeks of flowering. If you're growing outdoors or in a greenhouse, autumn rain and morning dew are your enemies. Indoors, invest in proper air circulation and a dehumidifier if your space tends to hold moisture. We've seen growers lose entire harvests to a single week of neglect in late flower. Don't be that grower.

G13 x Skunk Terpene Profile and Characteristics

According to a study on consumer perceptions of strain differences in cannabis, G13 samples were characterised by an earthy aroma profile, with potency and effect ratings averaging around 6.3–6.7 on a 10-point scale (PMC5798829). The Skunk parentage adds a sharper, more pungent layer to that earthiness — expect something musky, skunky (obviously), and slightly sweet when you crack open a cured jar.

The buds themselves have a satisfying density when you hold them. They're the kind that feel heavier than they look, with a tight structure coated in resin. When you squeeze one, it barely gives. That density is part of what makes the yield numbers so good — you're getting weight, not fluff.

According to research on genetic tools and cannabis strain classification, the relationship between strain names and actual genetic profiles is more varied than most people assume (PMC7815053). Mr. Nice is one of the few seed banks where the lineage claims are genuinely backed by documented breeding history — Shantibaba's work with the original G13 clone is well recorded.

G13 x Skunk vs Other Indica Seeds

If you're weighing up options, here's how G13 x Skunk stacks up against two other popular Indica-dominant choices in our catalogue.

G13 x Skunk wins on yield per square metre, full stop. If you want the most flower from the least space, this is the one we'd pick. Critical Mass is faster to harvest but doesn't quite match the output. Afghan Regular is the choice for purists who want uncut landrace genetics. All three need mould monitoring — that's just the Indica life.

Regular Seeds — What That Means for You

G13 x Skunk comes as regular seeds, not feminised. That means roughly half your plants will be male. If you're growing purely for flower, you'll need to sex your plants and remove males before they pollinate your females. With 15 seeds in the pack, you can reasonably expect 7–8 females — plenty for a solid harvest.

The upside of regular seeds? Breeders love them. If you want to select a standout male and cross it with another strain, regular seeds give you that option. They also tend to produce more vigorous, genetically diverse plants compared to feminised lines that have been through chemical reversal processes. For commercial growers running mother plants, regulars are often the preferred starting point.

Frequently Asked Questions

Last updated: April 2026