They are less cold-hardy, possibly to about 35 degrees, so you will need to protect yours during harsh winter weather. Both Southern and Belgian Indica types can become large shrubs, especially planted in a moist, well-draining, organically enriched soil with a good layer of mulch over the shallow roots. These plants prefer an acidic soil, but the Belgian types prefer more shade. Leaves will yellow between the veins if the soil becomes too alkaline. Orchids, according to the United States Department of Agriculture, are second behind poinsettias in floral potted plant sales.
Mums are third and azaleas fourth.
Use a formula for acid-loving plants. Scarlet buckeye, Aesculus pavia var. It, as well as other native buckeyes, usually sheds its leaves in late summer. Mail garden questions to Kathy Huber, garden editor, Houston Chronicle, P.O. Box 4260, Houston, TX 77210. The bulk of mail prevents individual replies to each unpublished letter.