The crape myrtle (Lagerstroemia sp.) is native to Asia, and as such, is not really in our area of expertise. Due to the large volume of questions we receive we generally limit our answers to questions dealing with North American native species. However, I can steer you to sources that can answer your question. There are several toxic plant databases listed below. You can check for crape myrtle on these lists. Please note that the absence of Lagerstroemia sp. from these lists does not guarantee that it is non-toxic to horses, but not finding it on the lists makes it less likely to be toxic. To search the lists, I recommend using the scientific name since those names are generally standard, whereas the common names often vary in spelling and usage.
Non-toxic plants for horses in Virginia from Doswell VA February 13, 2012 - Looking for a list of Non Toxic plants to horses in the State of Virginia. view the full question and answer
Non-poisonous Hedge for Southern California November 27, 2010 - What is a non-poisonous (to dogs), fast-growing, evergreen plant that I can grow as a tall screening hedge for privacy? I find differing opinions on Carolina Cherry and Podocarpus gracilior. Thank you... view the full question and answer
Petals of flowers on cake from London August 28, 2010 - Hi could you confirm that Gemini, Lisianthus and Lilies are non toxic if positioned onto a fresh cream cake (stem will be paced into a vial but the petals will come into contact with the cream). Thank... view the full question and answer
Vine non-toxic to alpacas and dogs from Fowler CA June 29, 2012 - We have alpacas and would like to plant a flowering vine on a backyard fence that adjoins the pasture. We live in Central California so we have many hot days during the summer and would like a plan... view the full question and answer
Non-toxic Groundcover for North-Central Texas April 07, 2011 - I need a creeping ground cover for shade that is non-toxic to dogs. I had planned on Swedish ivy until I read it was toxic. Is Asian jasmine toxic? Or, do you have any suggestions? view the full question and answer