Warm Winter / Frost-Free Areas — Zones 9b–12
April is full spring momentum in the warm-winter zones, with many gardens shifting decisively into warm-season planting while remaining cool-season crops finish strong. This is a great month to direct sow and transplant heat lovers outdoors, and to keep succession planting going so harvests don't gap as days get longer and brighter. In the hottest areas, start planning for rising temperatures by watching irrigation closely, adding mulch, and timing your final rounds of tender cool-season crops before consistent heat arrives.
Indoors (fresh harvests):
-
Microgreens: peas, broccoli, sunflowers, arugula
-
Sprouts: alfalfa, broccoli, radish, mung
-
Herbs & greens under lights: chives, parsley, mint
Transplants to move outdoors (weather permitting — harden first): pepper, tomato, eggplant, melons, basil
Crops that can be directly sown outdoors in April: cucumber, squash, beans, corn, melons, and okra. Transition note: lettuce, spinach, and other cool-season greens can still be sown in early April in some areas, but will bolt as the month progresses.
Cover crops: buckwheat, cow peas, sorghum
Tip: A Southern California zone 10 can be different from a Florida zone 10. Consider checking with your state Extension Service office for more specific recommendations and guidelines.
Use your USDA zone as a guide. Microclimates matter—coastal/urban spots run warmer; high elevation runs colder.
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![Legend: H for Heirloom, O for Organic, A for AAS Winner, F for staff favorites]()
Radish Seeds - Chinese - Shunkyo
30 to 40 Days to maturity. Raphanus sativus. Shunkyo Chinese Radish Heirloom Seeds. Cool Season Annual. Shunkyo radishes are a hidden gem that originates from Northern China. These radishes grow...
Radish Seeds - Butter Globe
Butter Globe Radish Seeds. 24 days to maturity. Raphanus sativus. Heirloom, Annual. A 1918 The Great Northern Seed Company says this variety is not withstanding its immense size does not...
Watermelon Seeds - Tom Watson
Tom Watson Watermelon Seeds. 90 Days. Non-GMO, heirloom, open pollinated seeds. Citrullus lanatus. AKA: Ole Tom Watson. A very old heirloom variety originating from the state of Georgia, dating back...
Pepper Seeds - Hot - Habanero Blend
80-90 Days to maturity (from transplant). Capsicum chinense. Habanero Blend Hot Pepper Seeds. This blend of habanero pepper seeds includes 6 colors for an attractive harvest. Colors include red, orange,...
Tomato Seeds - Slicing - Tasmanian Chocolate
70-80 Days to maturity (from transplant). Solanum lycopersicum. Tasmanian Chocolate Tomato Seeds. Non-GMO, warm season annual, open-pollinated, heat tolerant, indeterminate, slicing dwarf tomato. Suitable for growing in garden plots, raised...
Pepper Seeds - Hot - Thai Ornamental
80-90 Days to maturity (from transplant). Capsicum annuum. Thai Ornamental Hot Pepper Seeds. Non-GMO, annual, open-pollinated, deer-resistant, heat-tolerant, hot pepper with hot heat levels. 50,000 to 100,000 Scoville Heat Units....
Radish Seeds - Confetti Mix
Confetti Mix Radish Seeds. 25 days to maturity. Can be grown in containers. Raphanus sativus. Open Pollinated, Annual. Fast maturing colorful bled of red white and bi colored radishes with...
Radish Seeds - Hong Vit
Radish Seeds - Hong Vit. Heirloom, Non-GMO. Annual. Raphanus sativus. Up to 10 days, 20 days baby leaf. Cool season. This variety is one of the most popular grown radish...
Pepper Seeds - Sweet - Quadrata D'Asti Rosso
80-85 Days to Maturity. Capsicum annuum. Quadrato D'Asti Rosso Pepper Vegetable Seeds. Non-GMO, annual, open-pollinated, heirloom, sweet pepper. A large, green to red, sweet, blocky bell pepper. It produces thick-walled,...
Radish Seeds - Comet
Comet Radish Seeds. 23 - 26 days to maturity. 1936 AAS Winner. Can be grown in containers. Raphanus sativus. Heirloom, Annual. Deep-globe to round best at .75-1 in. bright-red skin...
Watermelon Seeds - Striped Peacock WR-60
Striped Peacock WR60 Watermelon Seeds. 85 Days. Annual. Heirloom, non-GMO, open pollinated seeds. Citrullus lanatus. AKA: Peacock. This heirloom watermelon prefers sandy soils and like all watermelons likes full sun...
Radish Seeds - Crunchy Royale - Hybrid
Crunchy Royale Radish Seeds. F1 Hybrid. Raphanus sativus. Non-GMO. Annual. 25 days to full maturity. Produces small, red round radishes. Crunchy Royale is a dark red, round radish with 4”...
Sunflower Seeds - Autumn Beauty (Organic)
90-100 Days to maturity. Helianthus annuus. Organic Autumn Beauty Mix Sunflower Seeds. Non-GMO, open-pollinated, organic, ornamental, annual sunflower seeds. Organic Autumn Beauty Mix seeds grow one of the summer's most...
Pepper Seeds - Hot - Cuban Chile
80-90 Days to maturity (from transplant). Capsicum annuum. Cuban Chile Hot Pepper Seeds. Non-GMO, annual, open-pollinated, hot, ornamental pepper with hot heat levels. 30,000-40,000 Scoville Heat Units. Suitable for growing...
Leaf Radish Seeds - Saisai Purple - Hybrid
30 to 40 Days to maturity. Raphanus sativus. Saisai Purple Leaf Radish Seeds. Annual, Hybrid. This red-stemmed leaf radish will stand out in any dish you make with it! Saisai...
Pepper Seeds - Hot - Jamaican Red
90-100 Days to maturity. Capsicum chinense. Jamaican Red Hot Pepper Seeds. Non-GMO, open-pollinated, heirloom, hot pepper seeds with extra hot heat levels. 100,000 to 350,000 Scoville Heat Units. This spicy...
Bean Seeds - Bush - Dark Red Kidney
90-100 Days to maturity. Phaseolus vulgaris. Dark Red Kidney Bean Seeds. Non-GMO, annual, open-pollinated, heirloom, high-yielding, bush, shelling bean. Suitable for growing in containers, garden plots, raised beds, and greenhouses....
Tomato Seeds - Salad - Variegated
90 Days to maturity (from transplant). Solanum lycopersicum. Variegated Tomato Seeds. Non-GMO, open-pollinated, indeterminate, warm season, annual, salad tomato. Suitable for growing in garden plots, raised beds, greenhouses, and large...
Tomato Seeds - Slicing - Boxcar Willie (Organic)
80 Days to maturity (from transplant). Solanum lycopersicum. Organic Boxcar Willie Tomato Seeds. Non-GMO, annual, organic, open-pollinated, heirloom, indeterminate, slicing tomato. Suitable for growing in garden plots, raised beds, and...
Tomato Seeds - Federle
85 Days to maturity (from transplant). Solanum lycopersicum. Federle Tomato Seeds. Non-GMO, annual, open-pollinated, heirloom, indeterminate, paste tomato. Also known as Federle’s Italian Paste tomato. Plant produces 7-inch-long red paste...
Sunflower Seeds - Velvet Queen (Organic)
90-110 Days to maturity. Helianthus annuus. Organic Velvet Queen Sunflower Seeds: Non-GMO. Open Pollinated. Organic. Ornamental. Annual. Heirloom. Velvet Queen seeds grow one of the summer's most exclusive and rare...
Tomato Seeds - Cherry - Cherry Roma
75-80 Days to maturity from transplant. Solanum lycopersicum. Cherry Roma Tomato Seeds. Non-GMO, open-pollinated. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Also marketed as Baby...
Tomato Seeds - Marmande
70-75 days to maturity (from transplant). Solanum lycopersicum. Marmande Tomato Seeds. Non-GMO, warm-season annual, open-pollinated, heirloom. Suitable for growing in garden plots, raised beds, and greenhouses. Marmande is the original...
Okra Seeds - Rainbow Fiesta
Rainbow Fiesta Okra Seeds. 30 to 60 days to maturity. Abelmoschus esculentus. Open Pollinated. Annual. Approximately 500 seeds/ounce. Okra Seeds - Rainbow Fiesta Rainbow Fiesta is a gorgeous colorful blend...
Bean Seeds - Pole - Akahana Mame
80-95 Days to maturity. Phaseolus coccineus. Akahana Mame Bean Seeds. Non-GMO, annual, open-pollinated, heirloom, pole, shell, Asian bean. Suitable for growing in garden plots, raised beds, and greenhouses. This "flower...
Pepper Seeds - Sweet - Red Cherry Sweet (Organic)
85 Days to maturity (from transplant). Capsicum annuum. Organic Red Cherry Sweet Pepper Seeds. Non-GMO, organic, annual, open-pollinated, heirloom, high-yielding, drought-tolerant, sweet pepper with mild heat levels. 0 to 100...
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