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]()
Squash Seeds - Winter - Hubbard White
90 days to maturity. Cucurbita maxima. Hubbard White Winter Squash Seeds.Non-GMO, annual, heirloom, open-pollinated. Suitable for growing in fields, garden plots, and raised beds. Classic white-skinned Hubbard with thick, bumpy...
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...
Melon Seeds - Branco Do Ribatejo
100 Days to maturity. Cucumis melo. Branco Do Ribatejo Melon Seeds. A non-GMO, annual, open-pollinated, heirloom, heat-tolerant Melon. Suitable for growing in garden plots, raised beds, and greenhouses. The Branco...
Radish Seeds - April Cross - Hybrid
Radish Seeds - April Cross - Hybrid. Non-GMO. Raphanus sativus. 60 days. Cool season annual. This giant white radish or daikon is a market leader for its extra-slow bolting habit,...
Watermelon Seeds - Picnic - Triple Sweet Hybrid
65 days to maturity. Citrullus lanatus. Triple Sweet F1 Hybrid Watermelon Seeds. Non-GMO, annual, F1 Hybrid, heat tolerant, seedless, picnic watermelon. Triple Sweet F1 is a sweet Crimson Sweet triploid...
Radish Seeds - Miyashige Green Neck
Radish Seeds - Miyashige Green Neck. Heirloom, Non-GMO. Raphanus sativus. 60 days. Cool season annual. One of the most popular varieties used in pickling. The mildly flavored, crisp, white roots...
Radish Seeds - Wakayama White
60 to 70 Days to maturity. Raphanus sativus. Wakayama White Radish Heirloom Seeds. Cool Season Annual. Wakayama White radishes come from the Wakayama Prefecture in Japan, as the name suggests....
Squash Seeds - Winter - Triamble
105 days to maturity. Cucurbita maxima. Triamble Winter Squash Seeds. Non-GMO, annual, heirloom, open-pollinated. Suitable for growing in fields, garden plots, and raised beds. An unusually beautiful Australian heirloom with...
Squash Seeds - Winter - Table Princess F1 PMT
Table Princess F1 PMT Hybrid Squash Seeds. Cucurbita pepo. F1 Hybrid. Non-GMO. Annual. 70 days to maturity. Table Princess F1 has a semi-bush habit, making it possible to plant in...
Squash Seeds - Summer - Summer Melody Blend
Summer Melody Blend Summer Squash Seeds. 45 days to maturity. Cucurbita pepo. Open Pollinated, Annual. This component blend of Golden Zucchini Black Beauty Grey Zucchini and White Bush Scallop is...
Melon Seeds - Cantaloupe - Haogen (Organic)
80-85 Days to maturity. Cucumis melo. Organic Haogen Cantaloupe Melon Seeds. A non-GMO, annual, organic, open-pollinated, heirloom, heat-tolerant Cantaloupe Melon. Suitable for growing in garden plots, raised beds, and greenhouses....
Squash Seeds - Summer - Ronde de Nice
50-60 Days to maturity. Cucurbita pepo. Ronde De Nice Squash Seeds. Non-GMO, annual, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Has demonstrated some...
Squash Seeds - Winter - Gold Nugget - Organic
Organic Gold Nugget Winter Squash Seeds. 75 - 95 days to maturity. Can be grown in containers. Cucurbita maxima. Heirloom, Non-GMO, Annual. Early compact runnerless plant with a Buttercup shape....
Radish Seeds - Korean - Sushiro - Hybrid
55 to 60 days to maturity in spring and 35 to 40 days to maturity in fall. Raphanus sativus. Hybrid Sushiro Korean Radish Seeds. Cool season hybrid annual. Not a...
Watermelon Seeds - Picnic - Greybelle
80-90 Days to maturity. Citrullus lanatus. Greybelle Watermelon Seeds. Non-GMO, annual, open-pollinated, heirloom, heat tolerant, seeded, picnic watermelon. Suitable for growing in garden plots. 15-20 pound round fruits. Greybelle watermelon...
Radish Seeds - White Cannon - Hybrid
58 Days to maturity. Raphanus sativus. White Cannon Radish Hybrid Seeds. Cool/Warm Season Annual. While it may not seem as exciting as some other varieties, this hybrid daikon radish focuses...
Squash Seeds - Summer - Zucca de Lungo Verde
Italian Summer Squash, Zucca de Lungo Verde. 50-60 days. Cucurbita pepo. Produces dark green squash about 8". It has a very rich flavor and color. Non-GMO, heirloom, premium open pollinated...
Melon Seeds - Crenshaw - Crenshaw (Organic)
110 Days to maturity. Cucumis melo. Organic Crenshaw Melon Seeds. A non-GMO, annual, organic, open-pollinated, heirloom, heat-tolerant Crenshaw Melon. Suitable for growing in containers, garden plots, raised beds, and greenhouses....
Squash Seeds - Winter - American Tondo
100 days to maturity. Cucurbita pepo. American Tondo Winter Squash Seeds. Non-GMO, annual, heirloom, open-pollinated. This is suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Italian...
Melon Seeds - Cantaloupe - Iroquois (Organic)
75-90 Days to maturity. Cucumis melo. Iroquois Organic Cantaloupe Melon Seeds. A non-GMO, annual, organic, open-pollinated, heirloom, heat-tolerant Cantaloupe Melon. Suitable for growing in garden plots, raised beds, and greenhouses....
Squash Seeds - Winter - Big Chief Hybrid
110 days to maturity. Cucurbita moschata. Big Chief Hybrid Butternut Winter Squash Seeds. Non-GMO, annual, F1 hybrid. This is suitable for growing in fields, garden plots, raised beds, and containers....
Corn Seeds - Dent - Hickory King Yellow
115 Days to maturity. Zea mays. Hickory King Yellow Corn Seeds. Non-GMO, annual, open-pollinated, heirloom, Dent Corn. Hickory King Yellow Corn Seeds, originating in Appalachia around the late 1800s. Huge...
Melon Seeds - Late Valencia
100 days. Cucumis melo var. inodorus. Valencia Late Melon Seeds. Non-GMO, annual, heirloom, open-pollinated. This crop is suitable for garden plots, raised beds, and greenhouses. Late Valencia is a winter...
Squash Seeds - Summer - Golden Zebra F1
Golden Zebra F1 Hybrid Squash Seeds. Cucurbita pepo. F1 Hybrid. Non-GMO. Annual. 50 days to maturity. Golden Zebra F1 is long and slender, with excellent flavor. The fruits are golden...
Watermelon Seeds - Mini - Treasure Chest Hybrid
Treasure Chest F1 Hybrid Watermelon Seeds. Citrullus lanatus. F1 Hybrid. Non-GMO. Annual. 80 days to maturity. Seedless. Treasure Chest F1 is a yellow triploid watermelon with sweet, bright yellow flesh....
Melon Seeds - Casaba - Sungold
85-110 Days to maturity. Cucumis melo. Sungold Casaba Melon Seeds. A non-GMO, annual, open-pollinated, heirloom, heat-tolerant, drought-tolerant, Casaba Melon. Suitable for growing in garden plots, raised beds, and greenhouses. This...
Bean Seeds - Pole - Prizewinner Runner
75 Days to maturity. Phaseolus coccineus. Prizewinner Runner Bean Seeds. Non-GMO, annual, open-pollinated, heirloom, drought tolerant, pole, snap bean. Suitable for growing in containers, garden plots, raised beds, and greenhouses....
Bean Seeds - Bush - Kouri Edamame Soybean
90 Days to maturity. Glycine max. Kouri Soybean Bean Seeds. Non-GMO, annual, open-pollinated, heirloom, high-yielding, bush, shell, soybean, Asian bean. Suitable for growing in containers, garden plots, raised beds, and...
Melon Seeds - Sakata's Sweet
85-90 Days to maturity. Cucumis melo. Sakata's Sweet Melon Seeds. A non-GMO, annual, open-pollinated, heirloom, heat-tolerant Asian Melon. Suitable for growing in garden plots, raised beds, and greenhouses. Resistant to...
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