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Irrigation, Mulches, Fertilizers & Weed Control

Mississippi summers are typically dry for weeks. Therefore, be prepared to water annual plantings as needed. To promote deep root growth, water thoroughly and deeply, then let soils get nearly dry before soaking again. Gently water annuals, using the fine spray setting of an adjustable nozzle or a breaker specially designed for watering. Soaker or sprinkler hoses are more convenient than hand watering because they provide a gentle flow of water that seeps into the soil. Trickle or drip irrigation kits conserve water by putting it only at the base of plants, a little at a time, and are best used frequently to keep soil moist. Soakers and drip systems also help keep foliage dry, which can reduce the spread of leaf diseases.

Decorative mulches such as pine straw, shredded bark, composted leaves, or other porous materials that allow air and water exchange help to conserve water and keep the soil cooler. Mulches also prevent many weed seeds from sprouting, but they can hinder reseeding annuals for the same reason. Soaker hoses can be hidden beneath the mulch.

Annual plants often require extra doses of fertilizer during the growing season. Whether a granular or a water-soluble fertilizer is used, follow label directions for use. Water-soluble fertilizers give fast, but temporary, effects. Slow-release fertilizers are the most expensive; however, they provide the appropriate amount of fertilizer to the plants throughout the growing season with little effort and waste, which makes them more economical and environmentally safe. Most annuals benefit from an all-purpose fertilizer having an even or nearly even balance between nitrogen, phosphorous, and potash, as indicated by the three numbers on the container. Flowering plants may perform better when you use a fertilizer with a higher middle number (more phosphorous); green or colorful foliage plants such as amaranth, caladium, and basil benefit from higher nitrogen (first number). Remember that fertilizers, like salt, go a long way; a little is better than too much.

The ideal soil pH is between 6.0 and 7.5 for most flower species. A soil test will indicate the need for lime, if any, and the amount for your particular soil type. For soil testing information, contact your county Extension office or use an inexpensive test kit available from a garden center or mail order catalog. Agricultural lime often lasts in Mississippi soils for three or more years; for this reason, it is best to not add lime unless a soil test indicates a need and quantity.

Few things can dampen enthusiasm faster than weeds. To reduce the need for hand-pulling or chopping weeds, there are herbicides that prevent weed seed germination and others that eliminate existing weeds on contact. Some may be used to control grasses without harming flowers. There are precautions and guidelines on the uses of herbicides, making none completely foolproof. Consult with your county Extension agent or local garden center on the selection and use of weed control chemicals, and carefully follow label directions. Mulches shade weed seeds and prevent their germination, thereby eliminating or reducing the need for hand or chemical weed control.

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Publication Number: IS0204
Publication Number: p3121
Publication Number: P3099
Publication Number: P3115

News

Purple viola flowers grow in a container.
Filed Under: Flower Gardens November 20, 2017

The last two weeks, I’ve told you about two of my top three cool-season flowering bedding plants. Today, I’m going to complete the trifecta with another plant everyone should have in their landscape: the viola.

Violas may have smaller flowers than their cousin, the pansy, but they’re maybe even tougher and more tolerant of cold, winter weather than pansies. These plants are beautiful massed in landscape beds, and they can be great performers all the way to Easter.

A close-up of white and pink dianthus blooms.
Filed Under: Flower Gardens November 13, 2017

Even though the air is still warm in many parts of Mississippi, it’s time to plant annual winter color. Last week, I wrote about pansies being a great color choice. Another sure-fire pick is dianthus.

A close-up of a pink pansy with a dark maroon blotch in the center.
Filed Under: Flower Gardens November 6, 2017

These days, I have to wear my hoodie sweatshirts and long pants for anything below 60 degrees. But the falling temperatures also signal something great: racks and racks of great, cool-season color as pansies fill local garden centers.

A head of cabbage grows in the center of a gorgeous red cabbage plant.
Filed Under: Flower Gardens October 30, 2017

This year, I’m getting an early start on my ornamental kale and cabbage planting for the fall.

A couple of weeks ago, I found these plants being marketed in variety packs, so I picked up a selection of kale and cabbage. What an easy way to select plants for your landscape this weekend.

Confederate rose is an heirloom plant that blooms prolifically in late summer and fall.
Filed Under: Flower Gardens October 23, 2017
I have weekly favorite plants, as you may know, and one of my favorites started blooming in earnest over the last couple of weeks. The sheer number of flowers on the Confederate rose makes this plant a must-have in our Mississippi landscapes.

Confederate rose is sometimes called Cotton rose and Cotton rosemallow. Despite the references to cotton, this plant is actually a hibiscus that originated in Asia.

Watch

Pansy and Viola
Southern Gardening

Pansy and Viola

Sunday, November 19, 2017 - 2:00am
Toucan Canna
Southern Gardening

Toucan Canna

Sunday, November 12, 2017 - 2:45am
Fall Lantana
Southern Gardening

Fall Lantana

Sunday, November 5, 2017 - 2:45am
Naked Ladies
Southern Gardening

Naked Ladies

Sunday, October 29, 2017 - 2:00am
Killer Cool Color
Southern Gardening

Killer Cool Color

Sunday, October 15, 2017 - 2:00am

Listen

Tuesday, November 21, 2017 - 2:45am
Monday, November 20, 2017 - 2:45am
Friday, November 17, 2017 - 2:45am
Wednesday, November 15, 2017 - 2:45am
Monday, November 13, 2017 - 2:45am

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