phacelia parryi

Some Native Seeds Require Sun to Germinate

Some Native Seeds Require Sun to Germinate

By Lee Gordon, CNPS Garden Committee

Some native seeds need long exposure to the sun in order to germinate. This report describes the role sun plays in the germination of seeds from three species. Two are borages: Phacelia parryiand Cryptantha intermedia. The third is Cneoridium dumosum, a citrus. It goes into some detail about the mechanisms that affect germination of these seeds. It then puts all this into the context of Deno’s theories of germination inhibition.  

The final section shows that pretreatment with Gibberelic acid, a plant hormone, enables the borage seeds to germinate as well as pea seeds we buy from a store.