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A partial shade site for
is best. Others will thrive in full sun.
varieties can take shade or sun.
Dig a hole 3 to 4 times the diameter of the root ball and 1 1/2 times
as deep. Next, remove the container. Container-grown plants must have
their outer root system broken and spread out or they will never become
established. Simply cutting the roots with a knife in 3 to 4 places is not
good enough, exposing about 1” of the root systems by vigorous shaking
will work. Then, place plant in hole and backfill until the plant is at a
level where grown in the nursery. Then, gradually backfill the hole while
tamping soil around roots with your foot. Do not break the soil ball.
Follow the watering directions then mulch with about 2” of bark mulch.
Prune the stems that flowered last season - don't prune un-flowered stems, because
these are going to produce the next lot of blooms. The best time to prune Hydrangeas is
after they have flowered and the blooms have died. That's not to say that normal pruning
rules shouldn't apply: cut back anything that's very weak and spindly and, of course, any
Large -leaved Hydrangeas: these Hydrangeas bloom on old wood. A
severe trimming in spring may prevent blooming. Just trim out dead
wood and trim to shape in late March.
Other types: trim after flowering.
The NEW Endless
Summer Hydrangea will bloom on old, as well as new wood and almost
never fails to bloom!
The most interesting feature of showy hydrangea flower heads is their ability to change
color according to the pH level of the soil. Hydrangeas have blue flowers where the soil
is naturally acidic, and pink or red blooms in alkaline soil. This gives the home gardener
a certain amount of control over the color scheme of the hydrangea bed. Winter is a good
time to start planning these changes - by the time the hydrangeas are in flower it's too
To change the color of Common Hydrangeas, add 5 to 8 Tbs. of aluminum
sulfate for blue or 12 to 15 Tbs. of dolomitic limestone (pulverized lime)
for pink per 10 square feet. Pull back the mulch and lightly mix into the
top layer of soil and water thoroughly. It may take 2 years for a complete
Water at initial installation. Use as much water as necessary to
thoroughly soak plants and wet entire bed. Then, water the plant
every 3 days for 3 weeks. After the 3 week period, water only when
necessary. Check soil moisture around plant before watering.
Remember, Hydrangeas are high water users, and, during hot periods, should
be kept well watered. If temperatures are above 85°F,
more frequent waterings may be needed.
Fertilize approximately on April 1st, May 20th, July 4th, August 15th
and October 30th. Use an acidic fertilizer such as Holly Tone. If using a
liquid fertilizer, do not apply it to the blooms of the plant.