Growing from Seed - Fails and and Surprises on June 15, 2018 cornus canadensis corydalis cava cowslip +8 geranium maculatum germination growing from seed helichrysum penstemon procerus picea glauca primula veris scarification stratification wildflower seed cornus canadensis corydalis cava cowslip geranium maculatum germination growing from seed helichrysum penstemon procerus picea glauca primula veris scarification stratification wildflower seed