Coleus – Downy Mildew Initially, the spores on the undersurface of the leaf are colorless; the spores turn greyish-brown as they mature.
Initially, the spores on the undersurface of the leaf are colorless; the spores turn greyish-brown as they mature.Initially, the spores on the undersurface of the leaf are colorless; the spores turn greyish-brown as they mature.