Plant Annuals Immediately After the Final Frost
If you’re looking to plant annuals in your flower garden this year, it’s time to get them into plots, pots and boxes. The threat of a frost ends mid-May in most areas of the United states, and you can safely plant most annuals immediately after. Wait a couple of weeks to put in tender plants such as impatiens, The Old Farmer’s Almanac says, and “harden” them in a sheltered spot or cold frame for a week or two if you started them from seed yourself. Mulch the beds to keep weeds at bay, and enjoy the array of colors as they bloom!