Answer: Here are some hot sun annuals within that height range: "Profusion" zinnia, "Patriot Rainbow" lantana, Pentas, salvia "Victoria", scaevola, "Elf" tithonia, and flowering vinca. (All available through Burpee, http://www.burpee.com or 800-888-1447.) When you prepare the planting area, be sure to add copious amounts of organic matter such as compost, rotted leaves, or aged stable manure and bedding. These materials will help improve the soil structure so that it will hold moisture (and air) better. You should also use an organic mulch such as shredded bark to help conserve soil moisture and moderate its temperature when the weatehr turns hot. Finally, when you water be sure to water deeply (dig down into the soil to see how effective you watering really is) about every five days or so rather than sprinkling lightly every day.
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