Re: Betula seed germination

> Does anyone have first-hand experience with Betula (birch) seeds? I've
> tried many different batches of different small-sized species, and all I've
> ever gotten is a single seedling of B. glandulosa.

> Some have been stratified (8 weeks), some haven't; some have been kept 
> dark, others under lights.

> I would welcome any suggestions.



Tom Clothier's new tree/shrub germination database 
http://www.anet-chi.com/~manytimes/page64.htm
recommends 3 months stratification for Betula. 
However, I had very good germination of Betula albosinensis v. Septrionalis
last season after putting it for only one month in the fridge and 
then outside at the end of February. On the other hand, B. papyrifera 
and B. ermanii, sown at the same time and treated the same way, have 
shown no signs of life yet.
In the past I have found seed of B. utilis var. jacquemontii (from 
Chilterns) has germinated very readily. 

Janet Galpin, near Spalding, Lincolnshire, UK, Min temp: -8

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