Low Desert Gardening - Knowledgebase Question

Mesa, AZ
Question by Sprockett47
September 15, 2000
I live in a fairly hot region and my garden never survives the summers. Can you tell me what zone I am in to better plan my future plantings?


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Answer from NGA
September 15, 2000

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You are in zone 9. However, I think it's equally important to understand the growing seasons here. There are two distinct growing seasons in the low desert with different annuals thriving in each season. There's a cool season from approximately the end of September through April. Annuals can be installed from late September to February. Some gardeners prefer to wait until October, as cooler temperatures also help kill off whitefly populations which can quickly decimate plants. The warm season starts with planting in mid to late February. Some plants will make it through the summer's heat; others will end their growth when the heat arrives.

A rule of thumb for cool-season vegetables is that we eat parts of the plant itself, such as leaves (lettuces/greens), stems (kale, broccoli and other cole crops) and roots (beets, carrots, turnips, onions). (In the warm season, we eat the seeds and fruits (tomatoes, peppers, cukes). The major exception is peas. Although we eat the seeds, we plant them in the cool season. Root crops do best if sown in place, rather than transplanted. Cole crops do well as transplants. I find leafy crops can go either way, but sowing in the ground seems easier to me, since thinning can be used in a salad!

Lots of flowers can be planted for enjoyment from late September through April. Some of my favorite easy-to-grow annuals include calendula, bachelor's button, pansies and violas, nasturiums, stock, snapdragons, alyssum, dusty miller, poppies and dianthus to name a few. Wildflowers are also seeded in the fall for spring bloom. October is a good month for that.

Warm-season annuals include sunflowers, tithonia, zinnia, coreposis, cosmos, gaillardia, black-eyed Susan, coneflower, lisianthus, and vinca.

A good reference book that contains planting calendars for the low desert is called "Desert Gardening for Beginners: How to Grow Vegetables, Flowers and Herbs in an Arid Climate." ISBN 0-9651987-2-3. Good luck!

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