Silver birch varieties. This is achieved by a short period of cold stratification in the fridge. Silver birches are quick-growing, usually slender, upright trees mainly grown for their decorative bark, which looks … A weeping silver birch is a graceful beauty. Their trunks are pale in colour with black notches that create deep, diamond shaped fissures along the white bark. Seedlings grow best in association with fly agaric fungus – look … The numerous winged seeds mature in late spring (unlike all other birches which produce seed in the fall), packed between the bracts of the female catkins. The dormancy within the seed is short and easily broken. Find out … Silver Birch (betula pendula) Birch seeds are relatively easy to germinate and grow. They are not too fussy about soil types, as they grow well in just about all soils, and will even tolerate occasional waterlogging. Heavy seed … Fully drain away all of the water and place the seeds … Silver birches prefer an open, sunny site. River birch seeds. The seeds are the largest of all birches native to the U.S. Bright white bark and long, downward growing shoots at the ends of the branches create an effect unmatched by other landscape trees. You can do this by first soaking the seeds in water for 24 hours. Birch … Silver Birch Its large numbers of tiny seeds are arranged in brittle catkins, which shatter when flocks of siskins and redpolls feed on them in early autumn. Silver Birch Botanical Description: Silver Birch Trees are fast growing, attractive trees.