Hydrangea Fall Care

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Few flowers evoke a sense of nostalgia better than hydrangeas. With their big puffy blooms and dense foliage, they are a delightfully old-fashioned addition to any garden. While most perennials don’t need much care in the fall, several species of hydrangeas need some attention in order to avoid the damage caused by extreme cold and the fluctuating temperatures common to more northern gardens.

A feast for the eyes
(hydrangea image by L. Shat from Fotolia.com)

Pruning dead growth back is best done in the late fall to early winter after the plants go dormant. Deadheading, or removing faded blooms, should also be done in early fall. When deadheading, notice if the cut part of the stem is still green, which means it’s still alive and should remain on the plant, as it will produce next year’s blossoms. Dead branches are easy to spot, as they appear shriveled and dry. Cut them down to about 6 inches from the ground. Prune any healthy branch down to the first set of leaves.

Getting rid of old growth
taille image by Claudio Calcagno from Fotolia.com

Early fall is a good time to harvest the hydrangea blooms for drying. They have begun to dry on the branch and will stay that way indefinitely if cut and placed in vases containing no water. Stop fertilizing hydrangeas at the beginning of August, but continue watering the plants regularly right into the fall. Dormant plants should get one last deep watering in late fall right before the ground freezes.

Preserving the beauty
raceme of white hydrangea in glass vase isolated on white image by vnlit from Fotolia.com

Late fall is the ideal time to move hydrangeas to a new location, as the plants have gone dormant and won’t be shocked by the move. Make sure to dig up the entire root system of the plants before moving them, and have a hole that is twice the size of the root ball ready for them. Place several inches of mulch around the base of the plant in its new location to keep the roots warm and discourage weed growth.

Nature's palette
Garden image by TC from Fotolia.com

Two types of hydrangeas, Paniculata or Peegee and Arborescens or Annabelle, can be grown just about anywhere without needing any winter protection. Other varieties, Quercifola or Oakleaf and Macrophyllla or Mophead and Lacecap varieties, should be covered to protect the delicate buds that form in late fall and that will bloom the following spring.

Hydrangea Arborescens or Annabelle
hydrangeas image by Ruslana Stovner from Fotolia.com

Cover young hydrangea plants for the winter with several inches of a mulch made of leaves, pine needles, hay, peat moss or a combination of these. Use garden mesh over the mulch to keep it in place. Put cages made of chicken wire up around older, taller plants and fill the cages with mulch, being careful not to break off the tips of the branches. You can also use burlap to cover the plants, and in areas that get a good snow cover in the winter, you can shovel snow onto the smaller plants as natural protection.

The garden in winter
winter in garden image by Zbigniew Nowak from Fotolia.com

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