Japanese Indigo - Seeds for your 2025 garden

These Japanese Indigo (Persicaria tinctoria) seeds were grown and harvested in Pinole, California in 2024 Each package contains 3 grams of unhulled seed or approximately 100-150 seeds and were grown and harvested in Zone 9b.   Our germination tests yield an 80-82% germination rate.  Sow these seeds fresh, as indigo seed viability decreases after the first year.     Growing Japanese Indigo Persicaria Tinctoria   Life Cycle  Annual  Zone  Half-hardy annual  Sunlight  Full Sun  Height  2' - 3'  Spacing  12" apart  Soil  Rich, fertile, well-drained;  pH neutral     When planning your space, on average each plant will yield enough pigment to dye one ounce of fiber.  I recommend planting 5-10 plants for a small garden.   Sowing Seed indigo indoors in trays or cells. Maintain a damp not sopping moisture level Potting On Potting on gives indigo time to establish good root formation. (Three weeks after potting or before planting in the ground, pinch out p