Low Desert Arizona garden in September
What grows in low desert Arizona gardens in September? I’ll show you. All of these pictures come from my garden in Mesa, Arizona.
September! We’ve almost made it through the long hot summer. The good news – lots to plant this month in the garden. The bad news – the days are still hot. Even so, the mornings and evenings are beginning to cool off, reminding us why we love to live in Arizona!
Gardening in Arizona means there is something to plant or harvest year round. Most vegetables can be grown in Arizona if they are planted at the right time, and for a lot of vegetables, September is the right time. Prepare your Arizona garden in September for fall planting by amending with compost and organic fertilizer.
Pests in the low desert Arizona garden in September
Unfortunately, the slightly cooler temperatures of September are inviting to pests. It is important to make efforts to prevent pests organically, but not all pests can be prevented. Be on the lookout this month for infestations in the garden. Read this article for organic pest control that really works.
Spider mites are a type of arachnid. Relatives of spiders and ticks, they can suck the life out of plants (literally). Prune out large infestations, and spray off with water or neem oil. You may need to treat repeatedly. Spray plants off with water regularly to prevent future infestations.
Tecoma plants, yellow bells and bougainvillea often get infested with small caterpillars at this time of year. If the plant is large, it usually survives the infestation without affecting the overall health of the tree. If you decide to treat, here are a few choices: spray off with water, soapy water, neem oil or use BT. When the weather cools a bit, the caterpillars will have moved on. Prune severely infected branches.
Whiteflies are active in the warm weather of late summer and early fall. Aphids are most active in cooler weather. If you notice infestations of either, try a soapy water treatment, giving particular attention to the undersides of leaves. Spray in the morning and be sure to rinse plants off afterwards. Several treatments are usually necessary.
What's growing in the low desert Arizona garden in September?
Which flowers are growing in the low desert Arizona garden in September?
September is a time of change in the annual flower bed. Clear out summer blooming annuals and amend beds well with compost. Once daytime temps are below 100℉, begin planting cool-season annuals from seed and transplants. Water newly-planted annuals each day until they show new growth and are established.
Blue Daze is an evergreen member of the morning glory family with blue flowers. This low maintenance plant thrives in tree wells or containers.
Blackfoot daisy loves hot dry conditions and does well in rocky areas. This low-mounding perennial gets about 2 feet wide and 1 foot high.
What's happening with fruit trees in the low desert Arizona garden in September?
Lemons are beginning to ripen in September. Skin color is not always an indicator of ripeness, so taste fruit to see when it is ready. Fruit stores best on the tree. The longer the fruit stays on the tree, the sweeter the fruit becomes. Fruit will not ripen once picked. Ripe citrus fruit can be left on the tree for up to 6 months depending on the variety.
What's happening with herbs in the low desert Arizona garden in September?
Arizona low desert garden in September to-do list:
- Prune summer-damaged perennial herbs back by about 1/3.
- Fertilize herb and vegetable beds, add compost as well.
- Do not prune fruit trees this month.
- Fertilize citrus trees, if you didn’t do it in late August. Water citrus deeply this month, before and after fertilizing.
- Once temperatures are below 100℉, begin to adjust time between watering citrus and other fruit trees to around twice a month. Water deeply but not as often as in the summer months.
- Clear out summer-blooming annuals and make room for cool-season flowers and annuals. Save seeds from zinnias.
- Find seed potatoes and begin the process of “chitting” them, so they will be ready to plant late this month or October. Learn more about how to grow potatoes in this article.
- Order garlic so you are ready to plant it in October. Store it in the fridge until it’s time to plant.
- Begin fertilizing roses again this month. Keep up with watering every few days until temperatures cool in October. Once temperatures are below 100℉, prune roses lightly to remove dead or diseased canes.
- Plant spring-flowering perennials this month.
Vegetables to plant in the low desert Arizona garden in September:
- Early in the month (before September 15th) plant seeds of Summer Squash and Beans.
- Plant seeds of Bok Choy, Broccoli, Brussel Sprouts, Cabbage, Carrots, Cauliflower, Celery, Chard, Collard Greens, Cucumbers, Endive, Kale, Kohlrabi, Lettuce, Leeks, Mustard, Green Onions, Parsnips, Radishes, Rutabagas, Spinach, and Turnips all month long.
- After September 15th plant transplants of Broccoli, Brussels Sprouts, Cabbage, Cauliflower, Celery, and Lettuce.
- After September 15th plant Beets (seeds), Peas (seeds), Potatoes, I’itoi Onions, and Strawberries.
Arizona Vegetable Planting Guide helps you learn when to plant vegetables in Arizona, and whether to plant seeds or transplants.
With 50 vegetables listed that grow well in the low desert of Arizona you are sure to find one to try.
Flowers to plant in the low desert Arizona garden in September:
- All month long plant: Begonia, Dianthus, Foxglove, Forget-me-not, Bells of Ireland, Baby’s Breath, Geranium, Marigold
- After September 15th plant: Calendula, Candytuft, Cornflower, Delphinium, Gaillardia, Larkspur, Snapdragon, African Daisy, Clarkia, Verbena, Salvia, Lanaria, Lobelia, Gazania, Petunia, Flax
Would you like the low-desert planting dates for vegetables, herbs, and flowers in a convenient calendar?
*PLANTING GUIDE: Each month has a planting guide (letter boards) for the vegetables, herbs, and flowers to plant in the low desert of Arizona.
*HARVEST GUIDE: Harvest guides are the harvest photos of what it is possible to harvest each month.