Debbie Archer | School of Agriculture, Fisheries and Human Sciences
The benefits of growing greens in the late summer are twofold, says Shaun Francis, Extension horticulture specialist for the University of Arkansas at Pine Bluff. Not only are greens good for human health, but they can also help ensure the soil health in a garden throughout the fall and winter.
“Whether cooked or eaten raw in a salad, most leafy greens are excellent sources of fiber and vitamins A and C,” he said. “Greens also happen to be the vegetable of choice to ‘feed’ your garden. When turned under in the fall, most greens replenish the organic matter in your soil, blanket the soil to protect it from fall frosts, and enhance earthworm and microbial activity close to the soil’s surface.”
As cool weather vegetables, leafy greens grow best and are the tastiest when planted in the late summer to early fall in south Arkansas, Francis said.
“Most greens grow quickly on sandy loam soils with an optimum pH of 6.8, making them ideal for growing in a variety of spaces,” he said. “In addition to planting greens in your garden, they can be spot-planted in flowerbeds, along walkways and driveways and even in containers.”
In the case of lingering high temperatures, greens can be planted in shady areas, including beside an okra or corn patch, along the side of a shed or under pole beans.
Francis said leafy greens popular in Arkansas home gardens include collards, kale, chard, celery, mustard, lettuce and spinach.
Collards, chard and spinach are productive during the warm late summer months with moderate humidity, Francis said. When grown at the right time, gardeners can prevent the bitter taste associated with these plants that results from premature flowering and stalk formation.
“Celery, kale, spinach and lettuce are best when grown at temperatures between 55 and 65 degrees,” he said. “A light touch of frost makes each of these plants tasty and tender.”
When planting greens, gardeners should sprinkle seeds on a wide row and cover with a half inch of soil. After germination, the greens should be thinned to allow 2 to 4 inches between each plant. Collards and kale require 10 to 18 inches between the plants.
“Adequate plant space is good insurance against disease outbreaks,” Francis said. “Wider rows allow for good air circulation so plants can dry off after rain or watering. Light watering is necessary for greens because their roots are anchored within the first few inches of soil.”
To harvest most greens, including chard, lettuce, mustard and spinach, cut them to only 1 inch above the soil’s surface, he said. This will allow the plants to quickly put on growth for another harvest.
When harvesting celery, collards and kale gardeners should pick the outside leaves or branches, making sure to never cut the main stalk if you intend to have multiple harvests.
“Garden soil should not be heavily fertilized before planting greens,” Francis said.
“A big burst of nutrients too early can burn the tender roots of the plants. Improve soil fertility by incorporating compost within the top 6 – 8 inches of the soil prior to planting and when the plants are about one-third grown. You can apply 2 pounds of 5-10-10 commercial fertilizer per 100 square feet.”
Troublesome insects including leaf miners, cabbageworms and aphids can pose a challenge when growing greens as they feed on the sap within the plant leaves and stems. To control the invasion of small leaf miners, simply remove any infected plants during the harvest. Gardeners can also spray a simple mixture of insecticidal soap and water to reduce aphid populations.
“Arkansans can continue to harvest and enjoy their greens at the dinner table through the fall months,” Francis said. “After the final harvest, plowing or rototilling the remnants of these gardens helps ensure early and productive planting next season.”
For more information about fall produce production or other horticulture topics, contact Francis at (870) 575-7224 or email@example.com.
The University of Arkansas at Pine Bluff offers all its Extension and Research programs and services without regard to race, color, sex, gender identity, sexual orientation, national origin, religion, age, disability, marital or veteran status, genetic information, or any other legally protected status, and is an Affirmative Action/Equal Opportunity Employer.