What to Plant in April — Zone 3

Start seeds indoors — Counted back from the last frost so transplants are ready on time.

🥬 Lettuce	Apr 3 – Apr 17	45–60 days to maturity
🥬 Kale	Apr 3 – Apr 17	55–65 days to maturity
🌈 Swiss Chard	Apr 10 – Apr 24	50–60 days to maturity
🍃 Collard Greens	Apr 3 – Apr 17	60–75 days to maturity
🥬 Cabbage	Mar 20 – Apr 3	65–85 days to maturity
🥦 Broccoli	Mar 27 – Apr 10	60–75 days to maturity
🥦 Cauliflower	Mar 27 – Apr 10	60–80 days to maturity
🥬 Brussels Sprouts	Apr 3 – Apr 17	90–110 days to maturity
🍅 Tomatoes	Mar 20 – Apr 3	60–85 days to maturity
🍏 Tomatillos	Mar 20 – Apr 3	70–80 days to maturity
🥒 Cucumbers	Apr 17 – Apr 24	50–70 days to maturity
🥒 Zucchini	Apr 17 – Apr 24	45–60 days to maturity
🎃 Winter Squash	Apr 17 – Apr 24	85–110 days to maturity
🎃 Pumpkins	Apr 17 – Apr 24	90–110 days to maturity
🍉 Watermelon	Apr 17 – Apr 24	75–95 days to maturity
🍈 Cantaloupe	Apr 17 – Apr 24	75–90 days to maturity
🌶️ Okra	Apr 17 – Apr 24	55–65 days to maturity
🌿 Basil	Apr 3 – Apr 17	30–60 days to maturity
🌱 Chives	Mar 20 – Apr 3	75–85 days to maturity
🌿 Oregano	Mar 20 – Apr 3	80–90 days to maturity
🌸 Zinnias	Apr 17 – Apr 24	60–70 days to maturity
🏵️ Marigolds	Apr 3 – Apr 17	50–60 days to maturity

Transplant outdoors — Set out sturdy transplants during these windows.

🥬 Lettuce	Apr 17 – May 1	45–60 days to maturity
🥬 Kale	Apr 17 – May 1	55–65 days to maturity
🍃 Collard Greens	Apr 17 – May 1	60–75 days to maturity
🥬 Cabbage	Apr 17 – May 1	65–85 days to maturity
🥦 Broccoli	Apr 24 – May 8	60–75 days to maturity
🧅 Onions	Apr 3 – Apr 17	90–110 days to maturity
🧅 Leeks	Apr 17 – May 1	100–120 days to maturity

Direct sow — Seeds straight into garden soil.

🫛 Peas	Apr 3 – Apr 17	55–70 days to maturity
🥬 Lettuce	Apr 17 – May 15	45–60 days to maturity
🍃 Spinach	Apr 3 – Apr 17	40–50 days to maturity
🥬 Kale	Apr 17 – May 1	55–65 days to maturity
🌿 Arugula	Apr 10 – Apr 24	30–40 days to maturity
🥬 Kohlrabi	Apr 17 – May 1	45–60 days to maturity
🥕 Carrots	Apr 24 – May 15	60–75 days to maturity
🫒 Beets	Apr 17 – May 1	50–65 days to maturity
🌶️ Radishes	Apr 10 – Apr 24	22–30 days to maturity
🥔 Turnips	Apr 17 – May 1	40–55 days to maturity
🥕 Parsnips	Apr 24 – May 15	100–120 days to maturity
🧅 Onions	Apr 17 – May 1	90–110 days to maturity
🧅 Scallions	Apr 17 – May 1	60–70 days to maturity
🥔 Potatoes	Apr 17 – May 1	70–100 days to maturity
🥬 Bok Choy	Apr 24 – May 8	45–55 days to maturity
🌿 Mustard Greens	Apr 17 – May 1	35–45 days to maturity
🌿 Cilantro	Apr 24 – May 8	45–55 days to maturity

Windows use zone 3's typical frost dates (May 15 / Sep 20). For your own city's dates, run the frost lookup — the planting calendar then localizes everything automatically.