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Monday - March 22, 2004
From: Austin, TX
Region: Southwest
Topic: Wildflowers
Title: More on bluebonnets
Answered by: Nan Hampton
QUESTION:
My Bluebonnets have taken over my flowerbed. Are there plants that can be planted along with Bluebonnets in a flowerbed?ANSWER:
There are several possible reasons that your Bluebonnets have become overly successful in your flowerbed: competition (a plant species successfully increasing its population by out-competing other species for existing resources) or allelopathy (lupines produce alkaloids that are released into the soil and can inhibit germination and growth in other plants). Try incorporating plants that you might see growing amongst the Bluebonnets in their natural habitat, plants that can co-exist and are possibly resistant to their allelopathic effects. Some suggestions for your eco-region (North Texas): Indian paintbrush (Castilleja indivisa), Indian blanket (Gaillardia pulchella), Mexican hats (Ratabida columnaris), golden-wave (Coreopsis basilis), black-eyed Susan (Rudbeckia hirta), Drummond phlox (Phlox drummondii).
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