Jack Flash Seeds
Jack Herer lineage with 600 g/m² indoor yields
$0.00 – $143.654 pack sizes — choose at ILGM
Guaranteed germination · Free US shipping over $50 · Discreet packaging
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Our take
Jack Flash is a sativa-dominant feminized strain built from Jack Herer, Super Skunk, and Haze — a lineage that shows in its citrusy, spicy aroma and 17% THC content. It's rated intermediate difficulty, making it a solid step up for growers ready to move beyond beginner strains. Expect dense buds, a focused and energetic character, and strong production potential.
Grow specs
Specs are ILGM's published figures for this product; catalog and pricing last verified August 2026. Our write-up is our own — see how we make money.
Growing notes
Jack Flash grows tall, so plan for vertical space indoors — topping or low-stress training early helps manage the canopy. It performs well indoors, outdoors, and in Mediterranean-style climates. Flowering finishes in as few as six weeks indoors. Intermediate growers comfortable with height management and feeding schedules will get the most out of its dense, high-yield bud structure.
New to growing? Start with the complete guide, plan your gear with tent setups, and diagnose problems with troubleshoot.
Want variety instead?
Mix packs bundle three proven strains (30 seeds) at up to 50% off buying separately — the best value in the catalog.
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