Is it too cold to overseed?
This is the question we are most often asked in regards to overseeding. The question comes from the notion that in general germinating seeds benefit from warm temperatures. Unlike many other seeds and plants, rye and fescue grass prefer cool weather for sprouting and growing. The Willamette Valley is temperate enough to allow for the successful germination of rye and fescue seeds even during the coldest months of the year. Germination and growth will happen but at a slower pace than the spring and fall which are the ideal times to overseed. The least favorable time to overseed is during hot dry summer weather.