They still get full sun, and we don’t use lawn fertilizer. The one that never blooms could be too deep – no buds develop at all. It’s worth a try to dig it up.
But the overall problem is probably that the foliage is getting whacked off due to mildew and blight in humid July. I didn’t know that could affect bloom – the plants themselves come back and look healthy each spring. Fighting fungus should be my focus, I think, to keep the foliage longer.
Thanks for your help.
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Welcome! I’m Margaret Roach, a leading garden writer for 25 years—at ‘Martha Stewart Living,’ ‘Newsday,’ and in three books. I host a public-radio podcast; I also lecture, plus hold tours at my 2.3-acre Hudson Valley (NY) Zone 5B garden, and always say no to chemicals and yes to great plants.