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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: P3318
Publication Number: IS0204
Publication Number: P2996
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Dozens of blue flowers bloom above an uninterrupted sea of green leaves
Filed Under: Flower Gardens January 14, 2019

Many home gardeners look forward to this time of year to browse catalogs in search of great new plants to enjoy in their 2019 landscapes.

One cluster of pink, crinkled flowers and some seed-heads are visible with dark-green foliage in the background.
Filed Under: Flower Gardens January 7, 2019

This January’s temperatures have been drastically different from what we saw during last year’s first month.

The colorful covers of about 20 gardening catalogs are fanned out on display.
Filed Under: Flower Gardens December 31, 2018

As I'm writing this last Southern Gardening column of 2018, I'm trying to take one more look back before plunging headlong into the 2019 gardening season that's just around the corner. But I'm having trouble concentrating because the mail carrier is distracting me.

Two-tone, yellow flowers bloom on green foliage at the base of a small tree planted in a container.
Filed Under: Flower Gardens December 24, 2018

2018 was quite a year in our Mississippi gardens and landscapes: hot and dry, humid and rainy. Every year, there are winners and losers when we garden, and such is the nature of the gardening game. 

A small pink stocking with a white fuzzy top hangs from a Christmas tree inside a house.
Filed Under: Flower Gardens December 17, 2018

With the Christmas celebration approaching, I’ve been thinking about favorite traditions, past and present. It probably comes as no surprise that many of these traditions are food related.

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