When to Plant Impatiens

Sowing Seeds Outdoors

• Prepare garden beds by adding compost and other amendments as recommended by a soil test to achieve a loose, nutrient-dense loam soil. Impatiens seeds can be sown directly into the soil after the threat of frost has passed for a later summer show into the fall in warmer climates. Follow instructions on the seed packet for your particular variety for better results.

Sowing Seeds Indoors

• Impatiens seeds can be started indoors up to 10 weeks before the threat of frost has passed. Always use a high-quality potting soil or a soil mixture designed for starting seeds. These lightweight, nutrient-rich mixes created from compost and/or peat moss and water-retaining agents such as perlite can also be found in pellet forms that will expand in warm water for use in greenhouse window kits. Follow instructions for planting as printed on the package when starting indoors. Cover containers with plastic wrap or commercial clear covers to help maintain humidity levels needed for emerging seedlings. Uncover once seedlings have developed two distinct leaves and are reaching the cover. Make sure seedlings receive plenty of sunlight in a bright window and are given plenty of water. Move seedlings outdoors for planting once frost has passed.

Planting Seedlings

• Annuals such as impatiens can be found at garden centers in inexpensive six- or four-pack containers of seedlings that are already blooming once frost has passed in your area. Look for plants that have healthy leaves that are not wilting or yellowing. Choose plants that do not have visible roots matted from the underside of packaging, if possible. Separating rootbound roots can damage growing plants. Follow instructions for spacing when planting in beds, depending on your chosen variety and plant in loose, well-worked soil.

Determining Frost Dates

• Frost dates vary in different areas and can even vary in close proximity, depending on valleys and mountainous areas. Tender annuals that prefer warm weather and soil need protection during any late-spring frosty nights and are better planted once the chance for frost has passed. Check with your local cooperative extension office or visit the USDA's Hardiness Zone map to get recommended dates for your area.