Direct Sowing:
* Warm Climates (USDA Zones 7-10): You can direct sow sunflowers in the ground as early as March or April.
* Cool Climates (USDA Zones 3-6): Wait until May or June when the soil has warmed up and the risk of frost has passed.
Starting Indoors:
* If you live in a cool climate or want a head start on the season, you can start sunflowers indoors 4-6 weeks before your last frost date. This allows them to get a jump on growth and flower earlier in the season.
Additional Tips:
* Check your last frost date: This is the date when the last frost typically occurs in your area. You should wait to plant sunflowers until after this date.
* Soil Temperature: Sunflowers prefer warm soil temperatures (at least 60°F). If you live in a cooler climate, it might be helpful to cover the soil with black plastic mulch to warm it up before planting.
* Sun Exposure: Sunflowers need at least 6 hours of direct sunlight each day.
* Spacing: Space sunflower seeds or seedlings 1-2 feet apart for dwarf varieties and 2-3 feet apart for taller varieties.
* Watering: Keep the soil consistently moist, especially when the plants are young. Water deeply but less frequently.
Remember, these are general guidelines, and the best time to plant sunflowers can vary depending on your specific location and growing conditions. Always check with your local nursery or gardening experts for the best planting recommendations for your area.
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