In the St. Louis area, Rudbeckia can be started from seed indoors in early February.

In the St. Louis area, Coleus, Lemon Balm and Leeks can be started from seed indoors in early February.

In the St. Louis area the following can be started from seeds indoors in early March: Peppers, Bok Choy, Cabbage, Alyssum, Chamomile, Marigold, Peas, Zinnia, Chili Peppers, Collards, Tomatoes, Lettuce, Lavender, Sage, Broccoli, Cauliflower, Calendula, Blackberry Lily, Shasta Daisy.

In the St. Louis area Penstemon, Little Bluestem Grass, Purple Coneflower and Rudbeckia can be planted outdoors in mid-March.

In the St. Louis area, Oregano, Parsley, Swiss Chard, Okra and Cilantro can be started from seed indoors in late March.

In the St. Louis area, Chives, Cosmos, Onions, Scallions, Arugula, Bok Choy, Cabbage, Alyssum, Peas and Garlic can be transplanted outdoors in late March. In the St. Louis area, Spinach, Turnips, Lettuce, Cauliflower and Carrots can be started from seed outdoors in late March.

In the St. Louis area Chocolate Flower, Showy Milkweed, Common Milkweed and Butterfly Milkweed can be planted outdoors in late March.

In the St. Louis area Leeks, Fennel, Collards, Swiss Chard and Broccoli can be transplanted outdoors in early April. In the St. Louis area Radishes, Parsnips and Carrots can be started from seed outdoors in early April.

In the St. Louis area Basil, Muskmelon, Summer Squash, Winter Squash, Stevia, Watermelon, Dill, Melons, Bush Beans, Pole Beans, Cucumber and Corn can be started from seed indoors in mid-April.

In the St. Louis area zinnia, basil, stevia and rosemary can be planted outdoors in mid-May.