Pair your zone number with your region's
last frost date to build a reliable planting schedule.
Once you have that key information, count backward to know when to start seeds indoors or transplant them outside.
But you already knew that. Right?
April Gardening by Zone: What to Start Now
Zone 3 (6–8 Weeks Until Last Frost | Frost: Mid-May to Early June)
Still chilly, but April is the perfect time to start seeds indoors for cruciferous veggies (like cabbage and collards), nightshades (like tomatoes and peppers), and cucurbits (melons, pumpkins, cucumbers). You can also begin hardy flowers and cool-season crops like spinach and endives. Late April may allow for directly sowing hardy crops like Swiss chard, horseradish, and onions using row covers.
Zone 4 (4–6 Weeks Until Last Frost | Frost: Mid-April to Late May)
Get your indoor starts going now for brassicas, lettuce, cucurbits, and even strawberries from seed. Outdoors, you can begin sowing frost-tolerant crops like spinach, radishes, and endive. April brings hope—and hard-earned sunshine—for Zone 4 growers.
Zone 5 (2–5 Weeks Until Last Frost | Frost: Mid-April to Late May)
This month is a transition from indoor starts to prepping for transplanting. Begin cucurbits, herbs like basil, and any last-minute leafy greens inside. Outdoors, start cool-season root veggies like carrots and parsnips, plant early flowers, and cover crops.
Zone 6 (1–3 Weeks Until Last Frost | Frost: April to Mid-May)
Start hardening off your seedlings and keep up with indoor starts for cucurbits, leafy greens, and herbs. Outdoors, you can begin planting peas, spring onions, root veggies like rutabaga, and hardy herbs. Watch for nighttime frosts, but April is full of progress.
Zone 7 (0–3 Weeks Until Last Frost | Frost: Mid-March to April)
Most indoor starts can now be transplanted outdoors. April is a great time to direct sow legumes, leafy greens, and root crops. Save space in your garden by interplanting fast growers with slow-maturing crops. Watch for the rare late frost and cover plants if needed.
Zone 8 (First Fall Frost in 28–32 Weeks | Fall Frost: Nov–Dec)
Frost risk is gone, so get planting! Direct sow beans, sweet corn, cucurbits, and warm-season herbs. If you haven't already, finish planting greens and cool-season crops before it gets too hot. Consider succession planting to keep your harvests steady.
Zone 9 (First Fall Frost in 30–34 Weeks | Fall Frost: Nov–Dec)
By April, you're well into your growing season. Transplant seedlings you started earlier and continue direct sowing crops like beans, peas, sweet potatoes, and lettuce. You may even be harvesting early greens now. Indoor growing is mostly optional unless for microgreens.
Zone 10 (No Frost Expected | Tropical/Mild Winter)
Zone 10 is all about heat planning now. Direct sow spring veggies like beets, spinach, and radishes. Transplant tomatoes, eggplants, and peppers if you haven't yet. Keep an eye on temperatures—cool-weather crops need to be planted early before summer heat arrives.
Local Knowledge is GOLD
Finally, remember that
local knowledge is gold—contact your state's cooperative extension for personalized tips and planting advice.
April is a garden-building month; a little preparation now sets the stage for a productive, healthy harvest season.
Whether this is your first time using seed trays or your twentieth year growing tomatoes, April is an exciting time for us gardeners!
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