Fall Gardening
September
fall gardening in alachua county
understanding the northeast florida climate
Fall is a fantastic time for gardening in Alachua County. As the summer heat begins to wane, Northeast Florida gardeners have a unique opportunity to start their fall gardens. The mild fall temperatures and extended growing season make this an ideal time to cultivate a variety of cool-season crops. Whether you’re a seasoned gardener or a beginner you can take full advantage of our unique growing conditions and enjoy a bountiful fall and winter harvest.
preparing your garden for fall planting
Before you start planting, it’s essential to prepare your garden beds. Most of Alachua County has sandy soil which often requires amendments to improve fertility and water retention. Start by testing your soil using a soil test kit or by sending a sample to the UF/IFAS Extension Soil Testing Laboratory. Based on the results, you can add soil amendments, such as compost, to enrich the soil. A pH level between 6.0 and 7.0 is ideal for most fall vegetables.
choosing the right crops
Selecting cool season crops for your fall garden can extend the gardening season. Cool season crops thrive in cooler temperatures, typically between 55°F and 75°F, and they are more tolerant of light frosts. These crops are planted in fall or early spring and are typically harvested before the onset of hot summer temperatures. Popular crops to grow in Alachua County in the fall include lettuce, mustard greens, onions, and strawberries, highlighted below, along with kale, broccoli, collards, cilantro, and parsley.
lettuce
Lettuce (Lactuca sativa) is a fast-growing, cool-season crop that thrives in the mild fall temperatures in Alachua County. Varieties like 'Butterhead,' 'Romaine,' and 'Leaf' are well-suited for our climate. Local lettuce cultivars include Grandpa Admires, Key Lime, Stem Lettuce, Queensland, and Magenta.
Planting: Start seeds indoors 4-6 weeks before the first frost or sow directly in the garden in October and space them about 6 inches apart.
Care: Ensure the soil is well-drained and water regularly. Be sure to mulch around the plants to retain soil moisture and keep the roots cool.
Harvesting: Harvest leaves as needed or wait until the heads are fully formed.
mustard greens
Mustard greens (Brassica rapa) are another excellent choice for fall gardening. They are fast-growing and can be harvested multiple times. Cultivars that grow well in Alachua County include 'Chijimisai', 'Feaster Mustard', 'Hon Tsai Tai', Turnip Greens. Bok Choy, a popular Asian leafy green, is also well-suited to Northeast Florida. Mustard greens can tolerate light frost.
Planting: Sow the seeds in rows, leaving about 12 inches between plants from September to November.
Care: Mustard greens prefer well-drained soil and full sun. Water consistently to keep the soil moist.
Harvesting: Begin harvesting leaves when they are young and tender, usually about 4-6 weeks after planting.
onions
Onions (Allium cepa) can be grown from seeds, sets, or transplants. They require a longer growing season, making fall the perfect time to start them. For the fall season, select short-day onions that need only 10-12 hours of daylight to start forming bulbs. Popular short-day varieties include ‘Granex’, ‘Texas Super Sweet’, and ‘Red Creole’.
Planting: Plant onion sets or transplants in October.
Care: Onions need well-drained soil and full sun. Keep the soil consistently moist and fertilize as needed.
Harvesting: Harvest onions when the tops begin to yellow and fall over. Cure them in a dry, airy place before storing.
strawberries
Strawberries (Fragaria x ananassa) are a delightful addition to any garden and can be planted in the fall for a spring harvest. Strawberries will begin to produce fruit in late winter or early spring. Varieties like ‘Camarosa’, 'Festival' and 'Sweet Charlie' are recommended for the Northeast region.
Planting: Plant strawberry transplants in October. Space the plants about 12 inches apart in rows that are 3 feet apart.
Care: Strawberries prefer well-drained, sandy soil and full sun. Mulch around the plants to retain moisture and control weeds.straw
Harvesting: Harvest strawberries when they are fully red and ripe, usually in late winter to early spring.
mulching and watering
Mulching is particularly important in the fall. It helps retain moisture, suppress weeds, and regulate soil temperature. Water your plants in the morning to reduce the risk of fungal diseases and aim to keep the soil consistently moist but not waterlogged.
pests and diseases
While fall gardening generally faces fewer pest problems than its warmer counterpart, it’s still important to be vigilant. Aphids, caterpillars, and slugs are common pests that can affect lettuce and mustard greens. Use Integrated Pest Management (IPM) strategies, such as hand-picking pests, using row covers, encouraging beneficial insects, and applying pesticides only when necessary.
Onions and strawberries are prone to fungal diseases, particularly in humid conditions. Practice good watering techniques such as minimizing overhead watering, ensuring good air circulation, and removing any diseased plant material promptly.
References
Brown, S.P., Treadwell, D., Stephens, J.M., and Webb, S. (2021). Florida Vegetable Gardening Guide. (#SP103). Retrieved 08/23/2024 from https://edis.ifas.ufl.edu/publication/VH021.
Cool-Season Vegetables. UF/IFAS Extension Gardening Solutions. Retrieved 08/23/2024 from https://gardeningsolutions.ifas.ufl.edu/plants/edibles/vegetables/cool-season-vegetables/.
Five fall vegetables for the home garden. UF/IFAS Extension Gardening Solutions. Retrieved 08/23/2024 from https://gardeningsolutions.ifas.ufl.edu/plants/edibles/vegetables/five-fall-vegetables/.
Jameson, M. (2024). Understanding Short-Day vs. Long-Day Onions. Morning AgClips. Retrieved 08/23/2024 from https://www.morningagclips.com/understanding-short-day-vs-long-day-onions/.
Lettuce. UF/IFAS Extension Gardening Solutions. Retrieved 08/23/2024 from https://gardeningsolutions.ifas.ufl.edu/plants/edibles/vegetables/lettuce/.
Liu, H. and Liu, G. (2023). Bok Choy, an Asian leafy green vegetable emerging in Florida (#HS1337). Retrieved 08/23/2024 from https://edis.ifas.ufl.edu/publication/HS1337.
Onions and Shallots. UF/IFAS Extension Gardening Solutions. Retrieved 08/23/2024 from https://gardeningsolutions.ifas.ufl.edu/plants/edibles/vegetables/onions-and-shallots/.
Strawberries. UF/IFAS Extension Gardening Solutions. Retrieved 08/23/2024 from https://gardeningsolutions.ifas.ufl.edu/plants/edibles/fruits/strawberries/.
Whitaker, V.M., Peres, N.A., Sriyanka, L., Brown, S.P., and Chandler, C.K. (2021). Growing Strawberries in the Florida Home Garden (#HS1154). Retrieved 08/23/2024 from https://edis.ifas.ufl.edu/publication/HS403.
Authored by: Dr. Cynthia Nazario-Leary, Environmental Horticulture Agent and Master Gardener Volunteer Coordinator, UF/IFAS Extension Alachua County.
Photo credits: UF/IFAS