Answer: The timeframe for planting hairy vetch is from mid-September to mid-October. It's almost too late now; for best coverage it should be planted a minimum of 4-6 weeks prior to the first frost. In my experience, a first frost usually arrives in mid-November in the Seattle area. You can certainly plant the seeds now, but the vetch may not have enough time to become a thick cover before the growth slows due to cold temperatures. On the other hand, some winters are mild - . I think I'd take a chance and plant it now.
Q&A Library Searching Tips