Wisteria Germination:
1) Unlike many seeds, wisteria seeds don’t require very high temperatures to germinate. But, be Sure to Keep nighttime temperatures above 55 degrees Fahrenheit and daytime temperatures around 75 F.
2) The tough outer hulls need to be weakened slightly to allow the embryo inside to germinate. To scarify them, Rub a file against the edge of the seed to thin the shell works well. Be careful not to go too deep, which will prevent them from germinating.
3) After scarifying the seeds, soak them in hot water for 24 hours to hydrate and further soften the shell. Use a thermos to keep the water warm.
4) It’s best to start the seeds in individual 3-inch pots to give the seedlings plenty of space to grow for their first few weeks of life. Choose pots with drainage holes around the bottom and fill them with a soilless seed-starting mixture because it’s sterile, moisture retentive and free from weed seeds, unlike some standard potting soils.
5) Sow wisteria seeds 2 inches deep, then set the pots on a tray to catch any water that leaks from the drainage holes; then drizzle water into each pot to settle the soil.
6) Check the moisture level in the growing mixture every day and mist the soil with water whenever it feels mostly dry on the surface. Don’t let the soil dry out completely, but also don’t keep it dripping wet because the seeds might rot.
7) Wisteria seeds will take 1-2 Months to sprout, at which point, move the pots near a bright, sunny window to encourage growth.