Started this plant from seeds this spring. It's doing well and blooming in a
container on our patio where it gets sunshine in abundance. Lately the plant
has developed many yellow leafs, at the bottom as well as elsewhere in its
foliage. This does not seem to have hindered its growth or flower buds, and
looks otherwise "healthy"... What could be the cause of the yellowing leafs
? It has been very hot and humid here in S.Ontario for many weeks. Excessive
watering ? Needs fertilizing ? Too high heat or too much sun ? Thanks !
B.T.