Approximately 390 seeds per gram
seed-counts are only a guide, not to be used for accurate calculations.
B and T World Seeds' reference number:
USDA average, annual, minimum temperature Zone:5
Type of plant - perennial
Flower: WHITE, PURPLE - GREEN tinge, axill. infls.
Fruit: (stratify 30 days, germ. 1-4 weeks)
Foliage: linear, to 8cm. long, whorled horsetail
Height in meters: 0.45
Parts of Asclepias verticillata are considered toxic.
Common names for Asclepias verticillata:
is included in the following B and T World Seeds flowering plant categories:
43: Herbaceous Border Plant Seed List
44: Cut flowers Commercial and other Recommended Varieties
45: Bee and Butterfly Attracting also Honey and Pollen Plant Seeds
57: Arid and Dry Condition Plant Seed List
86: Natives of U.S.North East
87: Natives of Central U.S.A.
89: Natives of U.S.South East
131: Toxic Plants
719: North American Native Ethnobotanicals
952: Wholesale Selection
Asclepias verticillata seeds will usually germinate in 30-90 days, even under good conditions germination may be erratic. Sow seeds about 2mm deep in a Peaty seed sowing mix at about 10-25°C.
Stratification (cold treatment or vernalization) Some seeds need to be overwintered before they will germinate. Some seeds need just a couple of weeks, others 3 months. Seeds can be stratified in dampened peat or sand, in a plastic box or bag at 4°C or 5°C in a refrigerator. The seeds should not be frozen or in a wet medium. Very small seeds can be sown on the surface of their growing medium, in pots sealed in plastic bags, and kept in the 'fridge. Many vernalized seeds need light to germinate when they are sown in the "Spring".
(Pre-chil for 3-4 weeks).