Jul 1, 2024 · When Should Sunflowers Be Planted? Plant sunflowers around two to three weeks after the last expected frost date for your growing zone. Wait until the soil temperature is between 50 to 60 …

Mar 9, 2026 · Wondering when to plant sunflower seeds outdoors? Learn the best planting time, ideal soil temperature, seed depth, and spacing in four simple steps for healthy blooms.

Feb 14, 2023 · Early spring – sow sunflowers indoors, under grow lights. 2. Mid spring – sow sunflowers outdoors, directly into the garden. 3. In winter – sow seeds in plastic milk jugs outdoors using a …

Jul 25, 2025 · The best time to plant sunflowers is in early spring after the risk of frost has passed. "In most areas, this would be around late April to mid-May," says Alexander Betz, landscape designer …

Oct 7, 2025 · Learn when to plant sunflowers for maximum blooms. This full guide covers regional timing, soil temperature, and expert tips for success.

Mar 12, 2026 · Plant seeds after the danger of spring frost has passed and the soil temperature is at least 60 degrees. This will be between March and May, depending on where you live.

Apr 17, 2026 · Plant sunflowers after your last frost date when soil reaches at least 50°F (10°C). In most of the US this means mid-April in southern states, late May to early June in northern regions.

5 days ago · Sunflowers can be direct-sown after the last spring frost or, if you start the seeds indoors and transplant them, about three weeks prior to the last fronst.

Apr 1, 2025 · When you're ready to plant sunflower seeds or seedlings, be sure the danger of frost has passed. The location should receive full sun for at least 6 hours daily. Sunflowers prefer fertile, well …

2 days ago · Learn exactly how to grow sunflowers from seed, step-by-step, from choosing the right variety to planting, caring for, and harvesting your blooms.