In my opinion, the prime planting season for most areas of Michigan is the first two weeks of June. Certainly a lot of gardeners get seeds and transplants in much sooner than that as stock is available in garden centers from early May forward.
Folks who grow tomatoes go to great lengths to plant early and then protect the plants from frost. Frost-free dates in the Lower Peninsula extend to early June; for much of the peninsula south of Midland, May 30 is the last day of anticipated frost. I don't see much to be gained planting annuals much before Memorial Day. Even though the chance of a late frost is minimal - and worth risking - the soil is still chilly. Plants need warm air and warm soil to do well. I suspect you'd see a plant set out on May 20 and its twin on June 10 look the same as far as size, flowers and overall vigor by July 1.
Planting too early seldom gains much. Note to readers: if you purchase something through one of our affiliate links we may earn a commission. Check with your local university coop extension service find yours here to find the first expected frost date in your area, then count backwards. And no matter what you plant now, keep watering during dry spells! These sturdy annuals will keep going strong until the first hard freeze, so add some to fill in sparse containers or to dress up beds that need late season color.
Kale also may surprise you and overwinter—that is, survive winter to appear again next spring! These cheery-faced flowers have golden daisy—like blooms and brown or black centers. Some black-eyed susans are annuals, but others are perennial. Pop perennial types in the ground now so their roots have time to get established, and they may come back again next year for months and months of color from summer to fall.
Talk about instant gratification: Radishes are one of the fastest-growing crops around. Sprinkle seeds in rows, and cover lightly with soil. Forget-me-nots Myosotis sylvatica can be sown throughout the summer months and into September. A useful ground cover plant for shade that will readily self-seed. Buy forget-me-not seeds from Crocus. Despite their vivid, exotic appearance, California poppies, Eschscholzia californica , are hardy, and will survive a winter outdoors.
Simply sow where you want them to flower. Here are full instructions on how to sow California poppies outdoors. Browse the fantastic range of fully mature hardy perennials, shrubs, ferns, grasses and bulbs to create a spectacular garden to enjoy all year round.
In many cases, summer-flowering bulbs are not hardy enough to survive winter outdoors, while spring-flowering bulbs may actually need a period of colder weather to trigger their spring blooms.
There are exceptions, of course! Hardy perennials that flower in the summer, like daylilies, can be planted in the spring or fall.
A true bulb is a specific type of underground storage structure—think onions, tulips, and daffodils. Wait until spring-flowering bulbs have finished blooming and their foliage has died back before digging, dividing, or moving them around.
Mark their locations with brightly-colored popsicle sticks so you can find them more easily in late summer or early fall, which is the time to divide and transplant. Read more about spring-flowering bulbs. Fall is also the time to dig up summer-flowering bulbs that need to be stored inside for winter.
Read more about growing summer-flowering bulbs here! I'm wondering if I can safely plant mature bought from a garden center succulents in my garden in late summer early September in northeast PA. I neglected my garden a bit over the summer and am hoping to give it a head start for next year, assuming it's an OK time to plant.
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