Approximately 650.00 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:3
Type of plant - annual or perennial, depending on climate
Height in meters: 0.30
Parts of Delphinium grandiflorum Summer Colours mix are considered toxic.
Delphinium grandiflorum Summer Colours mix
is included in the following B and T World Seeds flowering plant categories:
9: Alpine and Rock Garden Seed List (Hardy and Tender)
31: House and Container Plant Seed List
43: Herbaceous Border Plant Seed List
44: Cut flowers Commercial and other Recommended Varieties
53: Bedding Plant Seed List
131: Toxic Plants
698: First Year Flowering Perennials
Delphinium grandiflorum Summer Colours mix seeds will usually germinate in 14-21 days. Normally germinates in the dark. Sow seeds about 2mm deep in a Peaty seed sowing mix at about 10°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".
Cold stratify 2 weeks High temperatures cause dormancy.