UNLEASH YOUR HYDRANGEAS
FLOWER POWER!
Secrets of proper care and feeding for your hydrangea
Hydrangeas are full sun to partial shade plants that appreciate
moist, well-drained soil. Lots of organic matter will help
here, although the nicest hydrangeas I’ve seen were
all on Nantucket and Martha’s Vineyard in virtually
pure sand; I suspect it’s simply the moist part that’s
important; water copiously. We'll talk about pruning
hydrangeas as well as other factors that affect color,
growth and health.
As to feeding, don’t feed new plants until established
(1 to 2 months) and then use a balanced fertilizer. Feed sparingly,
as too much nitrogen stops flowering.
Hydrangea color
The other big question with feeding hydrangeas is flower color.
Acid soils give us blues and baser soils cause pink flowers.
The key is aluminum ions in the soil, so aluminum sulfate
is a good quick fix, but prolonged use year after year may
cause a fatal build up in the soil. Iron sulfate is a safer
fix, or try alternating. If pink is what you want, top dress
with dolomite or drench with a quick lime solution.
Failure to flower: frost and late pruning
Hydrangeas fail to flower for several reasons. Most common
would be frost damage, followed very closely by late pruning.
Too much shade or nitrogen are other likely culprits, but
lets look at siting our plant and pruning as our best controls.
If your hydrangea is not flowering look at your growing practices
and where you have it planted and make appropriate changes.
Partial shade means more than four (more like six) hours
of sunlight. Finding a more sheltered spot may help. But I
suspect that the reason 9 times out of ten is pruning practices.
Let’s review….
Pruning
Incorrect pruning is the biggest downfall of hydrangeas.
Too much pruning and the macrophyllas won’t
bloom, too little and the paniculatas become in Michael
Dirr’s words “Monstrosity in the landscape.”
The vine and big leaf types should be pruned immediately
after flowering or not at all! Cut back to a good pair of
buds, the last pair if you want to dwarf the plant back some.
The panicle hydrangeas should be pruned in winter or very
early spring and pruned HARD. Selecting 5 to 10 canes will
produce the huge panicles most people are looking for. Besides,
at 15 feet, Pee Gee needs reigning in. Cut it back to that
last pair or two of buds. You’ll be glad you did in
10 years.
Pests and Disease
While the list of diseases (wilt, blight, leafspot, rust)
and pests (rose chafer, scale, mites and nematodes) seems
daunting, I would tell you I have never actually seen any
of these, and don’t expect to. I have seen powdery mildew,
but this is easily controlled with benomyl, oil or lime sulfur
(the latter two will discolor blossoms). Generally the biggest
problems with this plant are siting and culture, so find a
sheltered, partly shaded spot, water regularly, and soon your
summer and fall will be filled with hydrangeas.
Summer is good
Hydrangeas can be the backbone of most summer borders. Their
cultural requirements lend themselves to combining with roses
(in a full sun situation; both need plenty of water), weigelia,
spirea, and any number of other summer flowering shrubs. Let’s
not forget the perennial border; there are any number of possible
combinations there. All in all, hydrangeas are a versatile
plant that deserves a place in your garden.
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The Grandiflora Hydrangea,
Hydrangea paniculata, is a common American garden plant and highly
valued for its vigor and bloom dependability. ...Read
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The Nikko Blue Hydrangea, Hydrangea macrophylla, has blue
blossoms on a plant with a strong constitution which make Hydrangea macrophylla
'Nikko Blue'...Read
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The Oakleaf Hydrangea, Hydrangea quercifolia, is an upright,
deciduous shrub with a broad, rounded habit that typically grows
4-6' tall. It features ...Read
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