I would like to use red, white, and blue hardy geraniums around my flagpole. Are these colors available? Will the plants later grow together to form rows?
Hi Mike! While not exactly what you were asking, I just saw a great display at HD, of all places, it was very eye-catching.
They used the perennial candytuft (Iberis sempervirens) which is white and has evergreen foliage, with annual blue lobelia (Lobelia erinus) and annual red geranium (Pelargonium peltatum) in the center. I think they used the candytuft around the geraniums, so it was planted in the order of "red, white and blue". I can't swear that candytuft blooms all summer, but I've read it blooms at least through July and reblooms in fall if deadheaded, and likes good drainage. It might be worth a try.
I have used white geraniums in hanging baskets and containers, and have been disappointed by the ratty way they look when the blooms fade. I like white star flower (Pentas lanceolata) better, no deadheading and they can really take the heat.
I used annuals, I don't think hardy geraniums come in red, just white and shades of pink and purple-blue.