|
Question
Can I still cut back Hydrangea plants (I think this
is their name, as I child we called them
"snowballs")? They are about 5 ft. tall by 5 ft.
wide with big full blooms. Now they look like long
green sticks with big dead green leaves hanging
down. Last year I cut them back in early spring
which proved to be too late; we had a huge bush with
no blooms this summer. Thanks a million.
Answer
It’s extremely difficult to cut back blue or pink
hydrangeas and have them bloom the following year.
You stand your best chance of success if you do the
cut-back just as the blooms start to fade in mid to
late summer---the earlier the better.
Question
Sometime in the last several years, listening to
your Saturday morning radio show, I seem to recall
hearing you mention that dry milk powder can be used
to speed up the decay of a tree stump; if this is
the case could you please provide some guidance for
an oak tree whose stump measures 32" across.
Thanks very much for any help and
Thank You for your great
radio show and helping
citizens with their gardening problems.
Answer
Powered milk will hasten the decomposition of a
stump. Just drill as many holes as possible, and as
deeply as possible, and pour in the powered milk.
Cover the stump with mulch to keep it moist. Decay
will be significantly faster, but will still take a
few years.
Question
I have planted three ornamental cherries in the same
spot and they keep dying. All of a sudden the leaves
turn yellow and then they hang on brown and dead and
the tree will not re-sprout next year. I know my
soil is heavy clay and the spot is certainly moist
enough. I always dig a huge hole and amend the soil
with lots of peat moss. I always plant my tree with
the top of the ball showing. And when I purchase a
potted tree, I pull the roots apart with my fingers.
Can you possibly tell me why I can’t have a
flowering cherry blossom?
Answer
Your planting technique is just about perfect,
although I suggest Leaf-gro instead of peat moss and
a hole that is broad but no deeper than the root
ball. The problem is the site you have chosen.
Cherry trees will not tolerate moist, heavy soil;
their roots must breathe. Although you have amended
the soil, think of the hole you have made as bathtub
filled with a soggy, slowly draining mixture of peat
moss and clay. Making the hole bigger only increases
the size of the bathtub, but the roots are still
drowning. You should choose a different spot for
your cherry tree and consider putting a different
tree, such as a
Magnolia Virginiana (Sweet bay
Magnolia), in your wet spot.
Question
I had a crab apple that had tiny apples on it and
the birds ate them all winter. But every year by
mid-summer all the leaves fell off my tree and I was
just tired of the leafy mess on my lawn in summer
and a leafless tree. So I cut it down. Now I miss my
birds and I want to put another tree to attract
them. What do you suggest, and is it too late to
plant now?
Answer
Crab apples vary greatly in their resistance to the
various fungi that attack the leaves and cause
premature defoliation. The newer varieties have been
bred for disease resistance and do not defoliate
prematurely. I suggest the new crab apple “Prairiefire”.
It is laden with small persistent red fruits that
the birds relish and which will not litter the lawn.
The blossom is a beautiful dark pink---almost red
and the leaves are a reddish-green, not as brilliant
as a red maple, but still very attractive. Crab
apples do best with late fall planting, and in your
area (eastern Pennsylvania) you still have several
weeks of good planting time ahead of you.
Incidentally, when I plant a tree in the fall, I
often try to surround it with a circle of spring
flowering bulbs. Being as I already have a broad
hole dug, it just seems to make sense to plant bulbs
surrounding the root of the tree. I like
white
daffodils or blue hyacinths around the pink
flowering Prairiefire.
|