University of Illinois Extension Peoria County
Peoria Master Gardener Newsletter
http://web.extension.uiuc.edu/peoria/journal/
For more information, please contact:
Peoria County Unit
4810 North Sheridan
Peoria, IL 61614
Phone: 309-685-3140 / Fax: 309-685-3397
E-mail: peoria_co@extension.uiuc.edu
June 2008
Gardening "Tips and Tricks"
June "Tips and Tricks"
❑ Houseplants will be reinvigorated if they spend the
summer outside. They will get sunburned adjusting to the
stronger light. Condition them by placing them in the shade
for 7-10 days.
❑ Stop picking asparagus as the weather warms but let
plants continue to grow so that you will have a good crop
next year. Fertilize with 10-10-10; 2lbs per 100 square feet.
❑ Daffodils, squill, snowdrops, and other minor bulbs can
be moved now as the foliage has started to yellow but has
not withered away.You can do this if the bulbs have become
too crowded or you would like them in another spot. Place
1T. of bulb fertilizer in the bottom of the planting hole. Do not
cut foliage until it has withered. Water well. It is easier to
move the bulbs at this time where you still know where they
are.
❑ Since we have had so much rain and have good ground
moisture, many perennials have just "taken off". Shear
chrysanthemums and asters in half; also cut back phlox,
catmint, sedum Autumn Joy (if it flopped last year) salvia
(after blooming), tansy, agastache, artemesias and goldenrod.
This pruning should made these plants bushier and
less likely to flop. Prune cranesbill geraniums after they
have bloomed to make them bushier. The newer cranesbills
which bloom all summer such as Roxanne, do not need
heavy pruning--maybe only a pinch.
❑ If your Annabelle hydrangeas flopped because the
flowers got too big, you can cut them back by half the
middle of June. You will have smaller flowerheads, but they
are less likely to flop.
❑ Clematis: Prune lightly Type 1 clematis (such as
Montanas, after they have bloomed.) They will not bloom
again until next year on the wood they produced this
growing season. Prune Type II clematis (many of the large
flowered types) after they have bloomed. They will rebloom
again depending on the cultivar. Don't prune Type III
clematis--they have yet to bloom. Be sure to plant something
bushy in front of this type, as it often shows it "legs"
and loses foliage at the bottom as the summer goes on.
❑ Prune those bushes that have flowered now. Next years
flowers form on this season's wood. Check your viburnums,
burning bush, etc. to see if they need renewal pruning.
❑ If you want your hostas to grow faster, remove flowers
after they have finished blooming before seedheads form.
❑ Apply a complete fertilizer such as 10-10-10 (1 lb per 100
sq. feet) alongside dahlias and gladiolas.
❑ Slugs and earwigs may hide under mulch and attack
plants at night. If you have had a problem in past years,
you might consider not applying a mulch to that area. If
your plants have scalloped bites on the edges of the
leaves, you have earwigs. Apply an insecticide such a
Sevin (after dusk so the bees won't be affected.)
❑ Rabbits can be a real problem in early summer. They
love lettuce, carrots, etc. A fence is the only way to prevent
them, although I intend to try Liquid Fence--thinking it will
wear off by the time I eat my lettuce. (I'll let you know).
Newly transplanted annuals are so tasty to rabbits at this
time of year--either fence them for a few weeks or apply a
rabbit repellant.
❑ Check your pines for sawfly. The green larvae can
defoliate a branch very quickly. A strong stream of water
should knock the larvae off of the plant. If that fails, apply
an insecticide. It is time to stake the plants that need
support as they grow (hopefully your notes from last year
will tell you which ones need staking).
❑ After roses have finished first flush of bloom, scratch in a
cupfull of 10-10-10 around each plant. Be sure your spray
program is in force as you need to treat for blackspot
before the disease begins. I prefer using a complete 3 in 1
fertilizer for my roses which feeds, protects against disease
and insects. I start this in May, but you could still start this
now. You have to reapply every 4-6 weeks.
❑ Apply a 2nd fertilization to your lawn toward the middle
to end of June. Water in well. Spot treat weeds as they
appear. Cabbage worms will attack cabbage, broccoli,
cauliflower and collards. Control with Bacillus thuringiensis
kurstaki which is sole under many brand names. If your
plants are in a row, place a white row cover over plants
immediately after planting (keeps the cabbage butterflies
from depositing the worms.)
❑ Squash vine borers will destroy zucchini, squash and
pumpkin plants at the soil line, Spray the base of stems
with Sevin after dusk to avoid injury to bees.
❑ Continue tying tomato plant to stakes. Tuck shoots of
caged tomatoes so the plant stays in the cage.
❑ Remember anything you transplant need special
attention for about three weeks before it recognizes its new
home. Water newly planted shrubs or trees at least once a
week. Annuals and perennials should be watered every
other day, or possibly daily if we have hot windy days.
Purchased plant material today is planted in pots of soiless
mix. This is a complete shock to plants when they are
transplanted and have to deal with real soil...maybe a very
clayey one. When planting, be sure to shake off as much
soiless mix as possible, mixing it with the "real soil". Then
"baby" the plant until it establishes. ( A vacation and new
transplants don't seem to work) Edible peapods are best