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 - Relish Cross - Hybrid
60 Days to maturity. Raphanus sativus. Relish Cross Radish Hybrid Seeds. Cool Season Annual. Relish Cross radishes are the best-selling variety in Japan due to their consistent quality, large size,...
Radish Seeds - Green Stem
8-12 Days to microgreen harvest. Raphanus Raphanistrum Sativus. Green Stem Radish Seeds. Annual, Non-GMO, Open Pollinated, Heirloom. These Green Stem Radishes are specifically intended to be used for sprouting and...
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...
Melon Seeds - Pickling - Katsura Giant
70 Days to maturity. Cucumis melo var conomom. Katsura Giant Pickling Melon Seeds. A non-GMO, annual, open-pollinated, heirloom, heat-tolerant Asian Melon. Suitable for growing in garden plots, raised beds, and...
Squash Seeds - Winter - Zao Feng Hybrid
95-105 Days to maturity. Cucurbita maxima x Cucurbita moschata. Zao Feng Hybrid Squash Seeds. Non-GMO, annual, F1 hybrid. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses....
Radish Seeds - Oshin - Hybrid
Radish Seeds - Oshin - Hybrid. Non-GMO. Raphanus sativus. 60 days. Cool season annual. Extra slow bolting radish with very late pithiness. It has strong tolerance to cold and medium...
Melon Seeds - Pickling - Green Striped
70 Days to maturity. Cucumis melo var conomom. Green Striped Pickling Melon Seeds. A non-GMO, annual, open-pollinated, heirloom, heat-tolerant, Asian Melon. Suitable for growing in garden plots, raised beds, and...
Radish Seeds - Sakurajima Mammoth
80 to 90 Days to maturity. Raphanus sativus. Sakurajima Mammoth Heirloom Seeds. Cool Season Annual. Known as the “Largest Radish in the World” in Japan, Sakurajima Mammoth radishes can grow...
Bean Seeds - Bush - Tamba Kuro Otsubu Soybean
120-150 Days to maturity. Glycine max. Tamba Kuro Otsubu Soybean Bean Seeds. Non-GMO, annual, open-pollinated, bush, shell, soybean, high-yielding, Asian bean. Suitable for growing in containers, garden plots, raised beds,...
Melon Seeds - Crenshaw - Marvelous Hybrid
100 Days to maturity. Cucumis melo. Crenshaw Melon Seeds. A non-GMO, annual, F1 hybrid, heat-tolerant Marvelous Hybrid Crenshaw Melon. Suitable for growing in garden plots, raised beds, and greenhouses. Melon...
Radish Seeds - Iwai Daikon
Radish Seeds - Iwai Daikon. Heirloom, Non-GMO. Raphanus sativus. 50 days. Cool season annual. Unique for its small size, this traditional Japanese radish has long been a favorite for New...
Melon Seeds - Crenshaw - White Crenshaw
100 Days to maturity. Cucumis melo. White Crenshaw Melon Seeds. A non-GMO, annual, open-pollinated, heirloom, heat-tolerant White Crenshaw Melon. Suitable for growing in garden plots, raised beds, and greenhouses. The...
Radish Seeds - Nerima
Radish Seeds - Nerima. Heirloom, Non-GMO. Raphanus sativus. 70 days. Cool season annual. This popular, large, long white daikon is a traditional variety that comes from Nerima-ku of Tokyo, Japan....
Bean Seeds - Pole - Shirohana Fujimame Hyacinth
90-100 Days to maturity. Lablab purpureus. Shirohana Fujimame Hyacinth Bean Seeds. Non-GMO, annual, open-pollinated, heirloom, heat tolerant, drought tolerant, pole, snap, Asian, specialty bean. Suitable for growing in containers, garden...
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...
Radish Seeds - Red Rat's Tail
50 Days to maturity. Raphanus sativus. Red Rat’s Tail Radish Seeds. Non-GMO, annual, open-pollinated, heirloom radish. This Asian aerial radish is grown for its 3-6 inch long, red and green...
Squash Seeds - Japanese, Winter - Shishigatani
Squash Seeds - Japanese, Winter - Shishigatani. Heirloom, Non-GMO. Cucurbita moschata. 110 days to maturity. Warm season annual. Since the Edo period of the early 1800s, this special Japanese pumpkin...
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...
Melon Seeds - Oshiro Uri Numane - Clearance Seeds
72% Germination - Non-refundable clearance seeds. 70 Days to maturity. Oshiro Uri Numane Pickling Melon Seeds. The Numane melon is a delicious traditional Japanese pickling melon. It grows as a...
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