May Planting Calendar

Spring planting for summer color

May may be the busiest gardening month for most of the country. It´s time to plant, divide, and transplant seedlings everything you haven´t been able to sooner. For much of the US, the prime growing season runs from May through August.

Check the Zone Map and Frost Dates for your region.


SOW IN OPEN GROUND - Ageratum, Amaranthus, Alyssum, Anagallis, Arctotis, Baileya, Browallia, Calendula, Calliopsis, Celosia, Clarkia, Cosmos, Dahlia, Euphorbia, Flax, Gaillardia, Gilia, Gomphrena, Gourds, Gypsophila, Hunnemannis, Impatiens, Kochia, Larkspur, Linaria, Lobelia, Madiera-vine, Malcomia, Mallow, Marigold, Mirabilis, Nasturtium, Nemophila, Nicotiana, Petunia, Periwinkle, Phlox, Poppies, Portulaca, Pueraria, Quamoclit, Salpiglossis, Salvia, Scabiosa, Schizanthus, Strawflower, Tithonia, Torenia, Zinnia.

SEED IN FLATS - Ageratum, Anemone, Begonia, Cineraria, Gaillardia, Gerberia, Geum, Peppers, Petunia, Portulaca, Salvia, Torenia, Trachelium, Zinnia.

PLANTS - Acalypha, Ageratum, Alternanthera, Amaranthus, Calendula, Callistephus, Celosia, Centaurea, Chrysanthemum, Coleus, Coreopsis, Cosmos, Croton, Cynoglossum, Diascia, Exacum, Gaillardia, Gerberia, Geum, Immortelle, Impatiens, Lobelia, Mallow, Marigold, Mimulus, Nemesia, Nicotiana, Oenothera, Penstemon, Periwinkle, Petunia, Phlox, Pinks, Rehmannia, Salvia, Schizanthus, Stokesia, Streptocarpus, Thalictrum, Torenia, Trachelium, Verbena, Zinnia.

BULBS-CORMS-TUBERS - Achimenes, Amaryllis, Anomatheca, Brunsvigia, Caladium, Canna, Clivia, Dahlia, Gladiolus, Gloriosa, Gloxinia, Lycoris, Madiera-vine, Polianthes, Sternbergia, Tigridia, Watsonia, Waterlily, Zephyranthes.


START SEED INDOORS - Cucumbers, Melons.

START SEED OUTDOORS - Artichoke, Arugula, Beans, Beets, Broccoli, , Brussel Sprouts, Cabbage, Carrots, Cauliflower, Cilantro, Celery Corn, Dill, Green Onions, Kale, Leeks, Lettuce, Parsnips, Radishes, Salad Greens, Spinach, Summer Squash, Swiss Chard, Turnips.

PLANT STARTS - Artichokes, Basil, Broccoli, Cabbage (early and late), Cauliflower, Celery, Collards, Cucumbers, Kale, Leeks, Onions, Parsley, Swiss Chard, Tomatoes.

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