Wait to Plant Warm Weather Flowers
If we learned anything the last two springs, it was that warm weather vegetables and flowers like tomatoes and marigolds do not like cool weather. They just sit there and make very little growth until the weather warms up.
It is easy to remember which vegetables are warm weather lovers. Except for peas, if you eat the fruit, then wait until next month to plant. April is a good time to plant all the cool weather root and leaf vegetables. They are all hardy and will not be damaged by frost.
Below is a list of hardy (cool) and tender (warm) annual flowers. Perennial flowers are all hardy and can be planted as soon as they become available.
Hardy (Cool) Annuals (plant now)
Alyssum, Candytuft, Carnation, Cleome, Dianthus, Dusty Miller, Gazania, Godetia, Hollyhock, Lobelia, Nasturtium, Nierembergia, Pansy, Petunia, Poppy, Blue Salvia, Snapdragon, Sweet Pea, Viola
Tender (Warm) Annuals (wait to plant)
Aster, Begonia, Celosia, Cosmos, Dahlia, Fuchsia, Geranium, Impatiens, Marigold, Moss Rose, Nicotiana, Phlox, Scarlet Salvia, Schizanthus, Stock, Verbena, Vinca, Zinnia