Join EDI at Crestridge Ecological Reserve, 1171 Horsemill Road, El Cajon, to weed and walk the Reserve trails. Invasive weeds are most problematic along trails, were bike treads, horses hoofs and vibram soles carry non-native seeds into the Reserve. With this winters ample moisture the invasive species are trieving. Help us hold them back and give our natives some room to grow. You'll learn how to recognize native, naturalized and invasive plants along the way.