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It’s Time to Plant Late-Summer Vegetables
by Dan Gill
by Dan Gill

email: dgill@agcenter.lsu.edu

Dan Gill earned B.S. and M.S. degrees in horticulture from Louisiana State University in Baton Rouge, and is an Associate Professor in Consumer Horticulture with the LSU AgCenter.

He is the spokesperson for the LSU AgCenter’s Get It Growing project, a statewide educational effort in home horticulture utilizing radio, Internet, TV and newsprint. Gardeners throughout Louisiana read his columns in local newspapers, watch his gardening segments on local TV stations and listen to him on local radio. In the New Orleans area, Dan appears weekly on the Channel 4 Morning News, writes a weekly gardening column for The Times-Picayune and hosts the Saturday morning WWWL Garden Show, a live call-in radio program.

Dan is co-author of the Louisiana Gardener’s Guide and author of Month-by-Month Gardening in Louisiana. His “South Louisiana Region Report” and “Only in Louisiana” columns appear monthly in the Louisiana Gardener Magazine.


August 5, 2012

There is something particularly satisfying about putting quality, nutritious food on the table as a direct result of your gardening efforts. This month is a transitional time in the vegetable garden.

While cool-season planting begins in earnest next month, some of the more heat-tolerant cool-season vegetables, such as the cole crops, can be planted into the garden now. And because our first frosts generally don’t arrive until late November or early December, we can also plant warm-season vegetables like tomatoes and cucumbers for fall production. Visit area nurseries to find out what vegetable transplants and seeds they have available.

It is important to prepare beds properly before planting this next set of crops. Clear the site of all weeds or finished vegetable plants. Turn the soil with a shovel, fork or tiller to a depth of at least 8 inches, and cover the tilled soil with a 2- to 4-inch layer of organic matter –leaves, grass clippings, aged manure or compost. This helps maintain a high level of organic matter in the soil, which encourages a strong, healthy root system, improves drainage, retains moisture, provides nutrients and promotes vigorous plant growth.

Fertilizer can be sprinkled on top of the organic matter. Apply an all-purpose fertilizer following package directions for rates. Gardeners should consider having their soil tested through their local LSU AgCenter office to learn more about their soil’s fertility and what fertilizer to use. A soil test will also tell you if you need to add lime.

Mix the organic matter and fertilizer thoroughly into the soil. Turn the soil with a shovel, garden fork or a tiller until the added materials are evenly distributed. If you are not gardening in raised beds, form the soil into raised rows about 8 inches high and 2 feet wide, with narrow walkways between them. If you are gardening in containers, use a quality potting mix, and fertilize with balanced soluble or slow-release fertilizer according to label directions.

Insects and diseases have had all summer to build up their populations, and insects such as whiteflies, stink bugs, aphids and caterpillars are commonly seen this time of year. Because insect and disease pressure is often greater in late summer/early fall than in spring, watch plants carefully for problems, and use appropriate control measures promptly when needed.

Now is the time to plant tomato and bell pepper transplants for fall production. If your pepper plants from spring are still in reasonably good shape, they will often produce an excellent fall crop once the weather begins to cool down (this also goes for eggplants). Keep them well fertilized and protected from insects and diseases. Spring-planted tomato plants rarely survive summer in decent shape, and new transplants are generally used for the fall crop. Tomato varieties that produce well in fall include Spitfire, Solar Set, Heatwave II, Carnival, Sunleaper, Sunmaster and Celebrity. Plant several varieties, and see which you like best.

Fall snap beans often produce better than those planted in spring. This is because as fall snap beans come into production, temperatures begin to cool down, while in spring the weather gets increasingly hotter as the beans produce their crop. They are one of the easiest and most-reliable vegetables and are especially appropriate for children’s gardens. Wait until late August in north Louisiana or early September in south Louisiana to plant so they will come into bloom after the weather has begun to turn cooler. And choose bush types. Bush lima beans may also be planted.

Cole crops to be planted this month from seeds or transplants include cabbage, broccoli, cauliflower, kohlrabi, kale, rape and collards. Cole is the Old English word for cabbage, and these days is used to refer to this group of closely related vegetables. (We still use the word when we call cabbage salad coleslaw.)

Broccoli is one of the best and easiest to grow of the group. Transplants may be planted now through early October. Seeds can be planted now through early September and may be planted into pots or flats and transplanted into the garden or direct seeded into the soil where they will grow. Plant transplants 12 to 18 inches apart into well-prepared beds. The closer spacing will produce smaller heads but more total production.

Here’s a list of the vegetables that can be planted into the garden this month:

– Transplants of tomatoes, peppers, broccoli, cauliflower, cabbage.

– Seeds of broccoli, Brussels sprouts, cabbage, Chinese cabbage, cauliflower, collards, cucumbers, kohlrabi, lettuce, mustard, turnips, squash, bush lima beans and bush snap beans (plant these in late August) and Swiss chard.

– Sets (small bulbs) of shallots and bunching onions.

– Small whole Irish potatoes saved from the spring crop.

Contact your parish LSU AgCenter office to receive a copy of their Vegetable Planting Guide, a free publication that will provide you with information on the year-round planting dates for many vegetables. Or find it online at www.lsuagcenter.com.

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