Hydrangea when do they bloom

Ordinary burlap can be used for wrapping. After the first hard frost and when leaves have fallen off the hydrangea wrap burlap around the plant and fill it with leaves or mulch. This provides insulation for the plant and protects the buds so they will overwinter into next spring. Never use plastic to wrap your hydrangeas. Late spring killing frosts are the other most common weather related reason as to why hydrangeas do not bloom.

Both this year and last year, we had very cold temperatures in April following warm spring days. Hydrangeas need to be covered with an old beach towel or sheet when spring temperatures drop to freezing. The temperature drop will kill the buds thus no flowers.

Location… Most hydrangeas need at least hours of light to produce blooms. Early morning light is excellent, mid day light is fine if it is dabbled light versus beating sun and afternoon sun is usually too hot. However, check the plant label. Newer hydrangea varieties are being developed to tolerate greater length of exposure to sun and intensity of sunlight.

Remember, a hydrangea in full sun will need much more watering than one in dabbled light. Blooms: Late-spring-early fall. Blooms can be blue, purple or pink based on soil pH. Soil: Moist, well-drained soil. Photo courtesy of Doreen Wynja for Monrovia. Penny Mac Hydrangea — Large flowers that just keep blooming! The Penny Mac hydrangea is super easy to care for and seems to thrive on neglect.

Blooms: Mid-summer-early fall. Blooms are typically blue, but can be changed to pink or purple based on soil pH. Vivid, lacecap blooms can be blue, purple or pink based on soil pH. Choosing one or more cultivars with varying characteristics is an ideal way to assure you'll see blooms all summer long.

Though hydrangeas like the sun and heat of warmer months, they need the kind of loving care that will keep them from wilting just when you most want them to blossom. Department of Agriculture plant hardiness zones 4 to 9, is one of the rarer varieties that produce blooms on both old and new wood.

According to the Missouri Botanical Garden. It blooms from June to August in zones 3 to 9. Because the flowers on Hills-of-Snow appear only on new growth, the Oakleaf hydrangea Hydrangea quercifolia , hardy in zones 5 to 9, is a good choice for a complementary cultivar because it blooms only on old growth, says the Missouri Botanical Garden.

Many combinations are possible among the various hydrangea cultivars. Thinking strategically about the ones you choose will assure you a steady, lush summer display. Pruning old growth after the blooming season makes sure that new-growth hydrangeas will produce flowers the next summer.

Another way to make sure that hydrangeas produce flowers throughout the hot summer months is to cut them back once the blooming season is over, says the Massachusetts Master Gardener Association.