Cosmos
Cosmos bipinnatus “Bright Lights”

Cosmos is at its best in mass plantings.  Its airy, fern-like foliage and showy, ray flowers put on a dazzling display.  Bright Lights is a saucy mix of oranges, reds, and yellows.  Full sun or partial shade can be tolerated.  It works well as a cut flower in arrangements.

When to Plant Outdoors
After all danger of frost is past, select a sunny to part shade location.  Moisten prepared soil thoroughly.  Using scissors, cut seed mats as desired.  Each mat can yield 2, 3, 6, or 12 sections depending on your needs.  Now, place each section where desired on the moistened soil and water thoroughly.  Seed in a Blanket® is designed to hug the ground when moistened so it will stay in place.  At this point, it cannot be lifted up in one piece.  Do not cover mat with soil.

Water frequently to keep seed mat moist until the second set of leaves are fully extended.  Do not let the mat dry out.  Germination should occur within 1 to 2 weeks depending upon weather and soil conditions.

When to Start Indoors
In a warm, well-lit location, start 6 to 8 weeks before the last expected frost.  Using scissors cut each mat into 6 to 12 sections as desired.  Place sections on well moistened soil-less potting mix in containers that allow good drainage.  Water until the mat is thoroughly moistened and hugs the planting medium.  Water evenly and do not let the mat dry out.  Expect germination within 1 to 2 weeks.

After the second set of leaves are fully extended, transplant seedlings into individual pots.  When all danger of frost is past, move to a shady and protected area outside for one week before installing in its intended position in the garden.   This is an important step that will allow the seedlings to adjust to conditions outside.

Tip – Keep planting area weed-free and cut flowers for use indoors.  Gather seeds at the end of the season for a bonus planting next year.

See Garden Basics for more helpful tips and techniques.