90 days. Thyme is the cornerstone for Herbes de Provence, lending essential depth to your homemade chicken and vegetable stocks. English thyme is delicious in herb butter on hot crusty bread. Thyme is bushy 6 to 8″ tall, making a nice perennial border plant. Best to start indoors one month before last spring frost date. 120,000 seeds/oz. Pkt (~250 seeds) plants 25′.