- You will get 50 Seeds of Mary Washington Heirloom Asparagus Herb Seeds. - Sunlight: Full Sun. - Life Cycle: Perennial. - Watering: Light. - Mary Washington Asparagus Seeds – Heirloom. - This Asparagus variety (Mary Washington) is an extremely popular and old heirloom variety. Grow heirloom Asparagus in any backyard. It's not hard to grow, it just takes a couple years for the root system to fully develop before you can pick the green shoots. There's nothing better than home grown and hand picked Asparagus. - The delicious spears are tender, thick, heavy and straight and are of a rich dark green colour with a purple tinge. Produces uniform spears and a heavy yield. It is fast growing, extremely hardy and rust proof, in addition the graceful, feathery green foliage remains attractive long after harvest. - Sow indoors in Late Winter to Spring. - Soak the seeds in water overnight. Sow seeds singly into modules at a depth of 1.25cm (½in). - They will germinate in 2 to 8 weeks depending on soil temperature. The optimum germination temperature is 20 to 28°C (60 to 85°F). After 12 to 14 weeks, they will be ready to be transplanted outdoors, do this no earlier than four weeks after the last spring frosts.