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-- W.M., Lake Jackson. A. Texas bluebell, Eustoma grandiflorum, blooms in summer and early fall and will grow in most areas of the state in sand, loam or clay and in sun or partial shade. This wildflower even tolerates some poor drainage. The similar E. exaltatum also grows in the salty climate near the Gulf.
Toxicity. All members of the lupine family, including Texas bluebells, may be toxic, according to the Ladybird Johnson Wildflower Center. The seeds, in particular, are high in alkaloids, and have been known to poison livestock and even cause birth defects in unborn calves after being ingested by a pregnant cow.exas bluebells grow wild throughout Texas. Several species of lupines are native to the U.S., and grow as wildflowers in pastures and prairie lands across the West and Midwest.