Outdoor Cannabis Seeds — Weather-Tough Genetics for UK Conditions — Page 19
Page 19 of best strains for outdoor growing at Royal King Seeds. Continue browsing the range below.
612 strains available
Best Strains For Outdoor Growing catalogue at a glance
Our best strains for outdoor growing collection currently holds 612 strains in active inventory with verified THC content ranging from 1% at the low end to 33% at the high end (median 20%).
- Feminised photoperiod: 602 strains (98% of the catalogue) — single-flip genetics with the largest single-plant yields.
- Sativa-dominant: 186 — cerebral effects, taller plants, Limonene-Pinene-Terpinolene profiles common.
- Balanced hybrid: 426 — mixed indica/sativa lineage, ranges from 60/40 to 50/50 splits depending on phenotype.
- Alphabetical lineup starts with: $100 OG, 13 Dawgs, 24k Gold — see the full grid below for filters, lab data and grower reports.
Best Strains For Outdoor Growing — Browse All Strains
Qualities of a Reliable Outdoor Strain
Outdoor genetics need to handle what nature delivers: wind, rain, temperature swings, pests, and mould pressure. The best outdoor strains carry natural resistance to botrytis and powdery mildew, tolerate temperature variation without stalling, and finish flowering within your local season window. In the UK, the primary outdoor growing calendar runs from late April to October, and the decisive part is the wet end of it. Long-flowering sativas need the extra fortnight the southern counties give them, while fast-finishing indicas and autoflowers are the reliable option in the north and at altitude.
Outdoor Strains Matched to UK Regions
Southern England (mildest, longest season): the widest choice, and the one region where a longer photoperiod is a fair outdoor bet — Sour Diesel, Jack Herer and taller sativas belong indoors here. The Midlands and Wales (temperate): Northern Lights, White Widow, Blue Dream, and mould-resistant hybrids. SA and WA (hot, dry): nearly any strain performs with adequate irrigation — ideal conditions for sativas and landraces. Scotland and northern England (cool, short season): autoflowers and fast-finishing indicas such as Critical Mass beat the early frosts. Across all regions, autoflowers guarantee a finished harvest before cold weather arrives.
Picking Outdoor Seeds for Your UK Postcode
Season length is the primary filter. Count the warm weeks available between your last spring frost and first autumn chill — that is your outdoor window. Photoperiod strains must complete flowering within that window, so check listed bloom durations carefully. Autoflowers only need ten to twelve weeks regardless, making them viable almost everywhere. Factor in local humidity: wet autumn conditions demand mould-resistant genetics or early-finishing strains. Shorter, bushier plants attract less attention than towering sativas — a practical consideration for discreet outdoor cultivation.
Why Grow Outdoors
Sunlight is the most powerful and spectrally complete light source on the planet — no artificial fixture fully replicates it. Outdoor plants can grow to massive proportions and yield accordingly. There is no electricity bill, and natural air movement keeps plants healthy without fans. The trade-offs: a single annual harvest window (unless using autoflowers), exposure to weather and pests, and less environmental control than an indoor setup. Many serious growers maintain both indoor and outdoor operations to capture the strengths of each.
Outdoor Growing Tips for the UK Climate
Start seeds indoors under a grow light in September and harden off seedlings before transplanting outdoors in October, once frost risk has passed. Position plants in a north-facing spot for maximum solar exposure (south-facing receives the most light in the UK). Prepare the ground with compost, worm castings, and amendments ahead of planting. Fabric pots or raised beds improve root aeration and drainage. Protect young transplants from possums, rabbits, and slugs. Monitor for mould from late February onward as humidity tends to rise. Harvest when trichomes are cloudy — do not delay if rain is approaching. Our regional outdoor guides detail the specifics for each state.
Frequently Asked Questions
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Best Strains For Outdoor Growing A–Z — part 19 of 26
12 of 300 strains, in alphabetical order. The index continues on the next page. Use the search bar above to find any strain.
