Vitex agnus-castus, commonly known as chaste tree or monk's pepper, is a deciduous aromatic shrub native to the Mediterranean region and Central Asia. Seeds exhibit physical dormancy requiring pre-treatment with either chemical scarification or hot water, followed by stratification at cool temperatures and warm germination temperatures for successful propagation.
Before sowing
Seeds display seed coat and endosperm dormancy. Multiple pre-treatments significantly improve germination. Without pre-treatment, seeds fail to germinate. Best results with combination of scarification and warm temperatures.
Sowing
What to expect
Tips
Press seeds into soil at approximately 1/16 inch deep and tamp firmly. Maintain medium moisture, not wet. Use heating mat to maintain warm soil temperatures (24-30°C) after cold stratification. Germination is erratic and can extend 4-6 weeks or longer. Start seeds indoors in early spring. Seedlings grow rapidly and should be moved to individual pots when large enough to handle. Extended water soaking (several weeks) may improve challenging germination. Light is not required for germination.
Sources: USDA Forest Service, ResearchGate, Strictly Medicinal Seeds, Plant World Seeds, Floral Encounters, Mountain Rose Herbs, ISHS proceedings
