Fall Blooming Aconitum or Monkshood
Doug says
Sounds like you have the wonderful fall-blooming Aconitum carmichaelii. This is a superb plant and is a delightful blue amidst the sea of fall oranges and yellows.
You don't say where you are but in a USDA zone 4, this plant is going to be an early to mid-fall bloomer. If you're colder, then you may have too short a season. If you're warmer, then I'd simply suggest compost as a way to feed it to get it bulked up enough to give you a slightly earlier bloom. (Compost is a good idea in any case rather than a chemical fertilizer. Overfeeding with chemical fertilizer may be pushing your plant to grow a lot of foliage at the expense of blooms). If you want to ask about other gardening tips for perennials, click here
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