These zinnia varieties keep giving all summer, making them the perfect choice for dedicated cutting gardens – or just the ...

Whether you start zinnia seeds outdoors or indoors will ... powdery mildew if their leaves stay wet. Add fertilizer: Working compost into the soil before planting helps zinnias grow better.

And since they are one of the best fast-growing flower seeds around ... a balanced fertilizer every 4-6 weeks during the growing season. She also adds that taller zinnia varieties may benefit ...