Many flowers grow to profusion in Texas. You only need to drive along the highways in spring to see the vast array of wildflowers that grow with no special attention at all. That is not to say that growing flowers in Texas is without its challenges. Summer heat can be extreme and drought conditions occur in cycles throughout central and west Texas. The six growing regions in Texas vary in temperature range, cold weather dates, and soil types--all factors that affect the types of flowers that can be grown successfully.
Learn the characteristics of your Texas growing region, including average first frost and frost-free dates, typical soil consistency and soil pH, and monthly rainfall.
Identify the characteristics of the flowers you want to grow---color, size, bloom times, annual or perennial and care requirements. Consider special plant features you want such as attracting butterflies, native plants or low environmental impact. Texas flower gardeners have hundreds of choices among plants adapted to their region.
Get a soil test to identify amendments needed for your flowerbed. Select a soil sample from three areas of the bed and three depths. Mix and place in a plastic bag. Soil testing is done by the Texas A&M AgriLife extension service.
Prepare your flowerbed by digging at least six to eight inches down and removing any plant material from the soil. Depending on the size of your beds, you can replace the soil entirely with a commercial potting soil or mix a combination of organic matter, peat moss and top soil.
Correct soil pH and soil nutrients based on information from your soil test unless you are completely replacing all of the soil in your flowerbed. In general, east Texas soils are slightly acidic and the soil in the rest of Texas is alkaline. The organic matter and compost will help correct many soil problems. In addition, adding lime will increase pH and sulfur will reduce it. Work a balanced fertilizer into the top four to six inches of soil.
Select your plants. Based on the characteristics of the flowers you want and the plants adapted to your region, make a list of plants that meet your requirements. In most Texas growing regions, except the Gulf Coast and Mexican border areas, gardeners plant flowering bulbs in the fall, hardy perennials in the fall or spring, and annuals in the spring or early summer.
Place flower transplants into your bed at a depth equal to their containers and follow package instructions for bulbs. Water the bed when plants are added and amend watering based on plant needs. Add fertilizer based on the needs and schedule for each type of flowering plant.