About the Journal
From Me to You
Calendar of Events
Things to Expect & Do
Ask A Gardener
Tomatoes in the
Creating A Butterfly
Stories to Delight
BCI Celebrates 20th
Designing Your Own
Herbs for the Bath
Center for Native &
January Citrus Clinic
Thing to Expect & Things to Do
by Terry H. Mikel,
Extension Agent, Commercial Horticulture
ALTERNARIA ROT may be found in blossom ends of navels and occasionally
tangelos. No chemical control is available.
ALEPPO PINE BLIGHT is thought to be induced by day/night temperature extremes on
tender, actively growing sections of these trees. Brown needles
cling to plump, healthy branches. Sun-exposed sides are most affected.
Normal refoliation occurs in the spring.
FREEZING NIGHTS - Cover frost-sensitive plants; always remove covering
during the day. Do not use plastic. Most citrus fruit will not freeze unless temperatures
drop into the mid-20's or lower for at least a couple of hours.
Lemons, limes and other thin-skinned fruit on the upper and outer periphery of
trees may receive some injury at about 28°F. If you use lights remember two
things: 1. Place or shine the lights on the large limbs or trunk to warm the most
mass, and 2. The higher the wattage of the bulb, the more heat is produced.
COLD WEATHER DISCOLORS FOLIAGE. Older leaves of evergreens turn
dull green to yellow and even drop. Even some actively growing shoots may
appear chlorotic. Some shrubs and trees may develop purplish-green leaves.
CONTROL WEEDS while young and tender or before their seeds sprout.
PREPARE GARDEN SOILS for spring vegetable planting. Early planting
means better yields in most spring crops; early means January.
CHECK STAKED TREES. Remedy trunk injury from ties and rubbing by
removing stakes or replacing rubber padding on ties.
PRUNE DECIDUOUS FRUIT AND SHADE TREES, ROSES AND GRAPES in
January, but first sharpen up your know-how. Prune citrus, bougainvillea and
other freeze-tender shrubs and trees after they begin to grow. Take advantage
of the many fruit and pruning demonstrations. Landscape trees do well with
pruning to remove dead or damaged branches only. Think long and hard
before pruning any tree.
PLANT POTATOES as early as possible. Prepare the soil down a foot. Dig a
hole or a trench to 8-10 inches and set seed potatoes there. Cover with a couple
of inches of soil. As the plant grows keep adding soil until the original
grade is met. Using certified "seed potatoes" avoids diseases.
FERTILIZE WINTER LAWNS monthly for good green color. Nitrate fertilizers
give quickest response during cool seasons. Fertilizing dormant Bermuda
lawns will stimulate weeds.
WATER DORMANT BERMUDA-GRASS LAWNS about monthly if rains are
FERTILIZE fruit, nut and shade trees, shrubs, and vines. Do not fertilize overseeded
rye lawns after February. Do not de-thatch common or hybrid
Bermuda - grass lawns until early May or later.
SWEET POTATOES are planted later, but started now. Buy the color you like
at the store and suspend it half deep in water with toothpicks, making sure
the "hook" end is up. Simply buy one with a hook. Change water often to
keep it fresh. After shoots appear, plunge the whole thing (shoots half covered)
in the water and roots will form.
THIN WILDFLOWERS NOW. They need room to grow because in a month
or so they will be in a vigorous growth phase. Thinning also reduces the
competition and the ones left flourish even more.
Maricopa County Master Gardener Volunteer Information
Last Updated January 25, 2003
Author: Lucy K. Bradley, Extension Agent Urban Horticulture, University of Arizona Cooperative Extension, Maricopa County
© 1997 The University of Arizona, College of Agriculture and Life Sciences, Cooperative Extension in Maricopa County
Comments to Maricopaemail@example.com 4341 E. Broadway Road, Phoenix, AZ 85040,
Voice: (602) 470-8086 ext. 301, Fax (602) 470-8092