16″ to 18″ When I think of a summer garden the first plant that comes to mind is the Dahlia. They are the epitome of summer and a must have for the garden. The ‘Dalaya’ series features very compact plants with strong stems, excellent for containers. This selection, Dalaya Shiva, is a bicolor with orange flowers tipped with yellow.
One of the biggest problems we have with Dahlia’s here is mildew. I have had good success with horticultural oil (the highly refined type). Spray with a low concentration, 1/2 strength mix, weekly or as often as you can. Once mildew starts it is hard to stop so these oil sprays add a protective layer to keep mildew away.
Another method is to use a product called Actinovate. This is a natural bacteria that attacks the mildew fungus. Very safe and very effective, but also needs frequent use. We apply weekly at the nursery.
Dahlias grow from tubers, somewhat like potatoes.