Fertilize: Around Labor Day nearly everything in your garden needs a complete fertilizer. Roots grow actively during the autumn and winter months. Fruit trees will absorb nutrients before leaf fall. Use a "fall fertilizer", i.e. lower in Nitrogen (N) and higher in Phosphorous (P).

Irrigation: Continue watering until rains begin. You may notice the need for watering isn't quite as dire as it was in previous months.
Fall Planting: Vegetables: spinach, peas, fava beans, onions, carrots, and successive rows of broccoli, cauliflower, cabbage, and lettuce.

Season Annuals: plant now to beat the rain, establish some healthy root systems and color that last through spring. If you buy new bulbs now, remember that tulips, crocus, narcissus and hyacinths should be refrigerated for 6-9 weeks before planting.

Maintenance: Feed with "fall" or "winterizing" formula. Last chance to tackle weeds like bermuda and nutsdege, which go dormant in winter. Fall is also a great time to aerate, if you can't easily push a screwdriver into your turf up to its handle, it's time to aerate. If over seeding is necessary, be sure to use grass seed that matches your lawn.

First Frost: Historically, Folsom's first frost occurs around November 14th! 

Clean Up Debris: Reduce the number of sites that harbor insects and diseases during winter, pull and discard weeds, spent annuals, and vegetables.  Also clean up all fruit and fallen leaves. Compost only plant debris that's free of disease, insect pests, and weeds.
Divide perennials: If blooms on perennials such as asters , bellflowers, callas, daisies, daylilies, helianthus, rudbeckia, and yarrow were smaller than normal this year and plants are weak or crowded, it's time to divide them. Dig out each clump so the root ball comes up intact. Gently shake off excess soil and divide with a sharp knife, pruning shears, or a shovel. Each division should have leaves and plenty of roots. Replant immediately.

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Prevent Winter Weeds: Pre-emergent herbicides are effective for six to eight months, so, if you applied one last March, its time for another application. Remember that you should apply half an inch of water afterwards. A good 4 inches of mulch also works towards weed suppression.

Autumn Pruning: Prune long stems from your hedges and shrubs, reaching well back into the plant. A compact shape provides the greatest protection from frost.
Folsom Weather:  September Average High - 88°F, Average Low - 58°F, Average Precipitation - 0.35 in.

Folsom Weather:  October Average High - 78°F, Average Low - 53°F, Average Precipitation - 1.05 in.

Folsom Weather:  November Average High - 64°F, Average Low - 46°F, Average Precipitation 2.43 in.

Folsom Weather Facts
On average, the warmest month is July.
The highest recorded temperature was 114°F in 1925.
December is the average coolest month.
The lowest recorded temperature was 12°F in 1932.
The maximum average precipitation occurs in January.

Folsom Weather:  December Average High - 54°F, Average Low - 40°F, Average Precipitation 3.48 in.
Irrigation:  If it's raining, make sure your automatic irrigation controller is set to "off". If we have a dry spell you may need to water (especially under the eaves). Insulate your exposed irrigation pipes with foam collars (available at hardware stores).

Annuals:  Cool-season annuals can still be planted if you didn't install them in early fall.

Seeds and Bulbs:  Buy summer bulbs and seeds locally, or for an even wider selection try mail-order. You can plant now if weather permits and soil is workable, or wait until early spring (after frost danger has passed). Many seeds can be started indoors now (the packages show the best planting dates). If you don't have a greenhouse, try a domed seed-starting kit.

General Clean-up and Maintenance:  Rake any leaves remaining on the lawn and add them to your compost pile. Minimize foot traffic on wet lawns. Clean, oil, sharpen gardening tools.

Folsom Weather:  January Average High - 54°F Average Low - 41°F, Average Precipitation 3.97 in.
First Frost:  December 21st is the first day of winter and frosts are common this month, so be ready to provide frost protection, e.g. lights, blankets, plastic, mulch, etc. for frost-tender landscape plants (citrus, bougainvillea, etc.).

Hummingbirds:  Maintain Hummingbird feeders.
Tools:  Clean and repair garden tools and equipment.
Poinsettias:  Keep Poinsettias sunny and warm, feed monthly, water thoroughly.
Chrysanthemums:  Both in the ground or in a pot, after they've bloomed, cut to about 6-8"
Water:  Water plants that rain cannot reach.
Dormant Spray:  Spray to control over-wintering insects and diseases. An easy-toremember schedule for spraying is "Thanksgiving, Christmas and Valentine's Day"

Folsom Weather:  February Average High - 61°F Average Low - 44°F, Average Precipitation 3.82 in.
Spraying & Fertilizing: Finish up dormant pruning and spraying. Feed with a slow release fertilizer.

Perennials:  Divide perennials.

Tools/Irrigation:  Clean and sharpen tools, troubleshoot your irrigation system.
Citrus:  Citrus are heavy nitrogen-feeders. An application of nitrogen in late winter/early spring will provide adequate nutrients for flower and fruit set.

Weeds:  Pull young annual weeds now while they still come up easily and haven't had a chance to form seeds.
Camellias and Azaleas:  Rake up and dispose of fallen petals to discourage petal blight. Feed with azalea/camellia food after bloom.

Fuchsias: Cut back fuchsias to encourage lush new growth.
Soil:  Check periodically for moisture content if there hasn't been much rain. This can be done with a trowel, a soil probe or moisture meter.

Roses:  Feed roses with a timed-release fertilizer after pruning. To encourage new canes, apply commercially packaged alfalfa and 3/4 cup Epsom salts around the based of each plant. Water well.

Bird Feeders:  Position so that trees and shrubs are nearby. In ancient times, it was thought that birds chose Their mates on Valentine's Day.
Folsom Weather:  March Average High - 67°F Average Low - 47°F, Average Precipitation 3.02 in.
Soil Care:  Enrich the soil by spading in compost and amendments.  Mulch 3"- 4" deep around, but not against, plants to reduce water evaporation, suppress weed growth, reduce erosion, encourage root growth by insulating soil from temperature extremes and improve the soil.

Feed:  Roses, annuals, berry and citrus, spring flowering shrubs, trees and camellias after bloom, lawn grasses.

Look for Pests:  Aphids, mildew, rust, black spot, slugs, earwigs and snails. In the early a.m. (not the p.m.) washing off plants, with a powerful spray, is often enough to avoid disease and control pests. In the p.m., hand pick the creepy-crawlies.

Enjoy:  Browsing through garden catalogs and local nurseries. Consider new color schemes; native plants; unusual herbs and veggies.

Folsom Weather:  April Average High - 73°F Average Low - 49°F, Average Precipitation 1.30 in.
Weed & Moisture Control:  Replant ground covers where they have become sparse; mulch around plants, leaving a small circle of bare soil at the base. Deep-water trees and shrubs. Control weeds and preserve moisture by replenishing groundcovers and mulch, but leave the base of shrubs and trees exposed. As the temperature rises, keep checking the soil moisture to be sure of efficient irrigation.
Spring Bulbs:  Trim only the flowers; the bulbs receive nourishment through the leaves.

Chrysanthemums:  Pinch back to 12" for Fall flowers, cut old stems to the ground.

Mildew:  Apply sulfur or potassium bicarbonate to roses and ornamentals if temperature is below 90F.  To grapes, apply at budbreak and then every 10 days as needed.

Rejuvenate Plants:  Rejuvenate potted plants by gently scraping away the top half inch of soil and replacing it with fresh soil.

Design a Herb Garden:  To encourage butterflies, include feathery herbs, such as dill, fennel and parsley. These are favorite host foods for the black swallowtail butterfly.

Folsom Weather:  May Average High - 81°F Average Low - 54°F, Average Precipitation 0.76 in.
Citrus, Azaeleas, Camellias:  Apply chelated iron if leaves are yellowing between the veins.
Shrubs:   To conserve the vigor of shrubs: remove spent flowers, trim to shape and remove old wood. Remove the flowers of newly planted perennials to channel growth to the roots.

Birds & Squirrels:  To deter birds and squirrels: place strips of foil, even old CDs, in fruit trees.
Deter Pests:  Plant marigolds at the end of vegetable rows to help deter pests.

Flower Pots:  Before reusing flower pots wash them with detergent and water, rinse with water and a splash of bleach, then let them dry in the sun.

Powdery Mildew:  Check for powdery mildew on such plants as grapes and roses.
Folsom Weather:  June Average High - 88°F Average Low - 58°F, Average Precipitation 0.19 in.
Citrus, Azaleas, Camellia:  Apply chelated iron if leaves are yellowing between the veins.
Chrysanthemums:  Pinch back to 12" for Fall flowers, cut old stems to the ground.
Mildew:  Apply sulfur or potassium bicarbonate to roses and ornamentals if temperature is below 90F. To grapes, apply at budbreak and then every 10 days as needed.
Water:  Water: early in the day, (e.g. lawns between 2am and 8am) to conserve and minimize plant disease. Check automated sprinkler systems for adjustments and repairs. Most shrubs will do fine with watering every two weeks. Fill the watering basins of fruit trees with three inches of water every two weeks.

Mulch:  Most important: MULCH!

Mow Lawns High:  Raise the mower cutting height to 2 or even 3 inches. It's the best way to conserve water and crowd out weeds.
Snails & Slugs:          Pre-bait flower and vegetable gardens before transplanting and before seeds germinate. Bait entices the pest (snails, slugs and insects) to feed, giving good control before plants have appeared in their environment. Give the bait a couple of nights to work to ensure thorough control.

Aphids:  A blast of water from the hose helps keep aphids off your roses and other plants


Folsom Weather:  July Average High - 93°F Average Low - 61°F, Average Precipitation 0.00 in.
Perennials  Feed when about to bloom and continue deadheading spent flowers. Cut back after they finish.
Chrysanthemums:  Stake and tie flopping stems. For large single flowers, pinch off all side buds, but leave a single bud at the terminal end (i.e. the tip) of the stem. Continue feeding until buds show color.
Bearded Iris:  Dig, divide and replant through August.
Hydrangeas:  If you haven't already, prune hydrangeas now. Wait too long and you'll be pruning away next season's flowers.
Herbs:  Keep from flowering to redirect energy to leaf production. Do this by harvesting often!
Clean Up:  Clean up any fallen fruit, vegetables and flowers to help head off future pest problems.
Potted Plants:  Potted plants on a hot porch need to be watered thoroughly. Dunk the pot into a bucket of water or slowly water the container with a hose.
Grass Mulch:  If you use grass clippings as mulch around trees and shrubs, let them dry out thoroughly to prevent matting and rotting.
Fruit Tree Pruning:  New research shows the benefits of summertime deciduous fruit tree pruning to keep trees at a manageable height, with fruit within easy reach.  Cut back or remove branches above that height.
Watering Check:  Dig down a foot and check the soil moisture around stressed shrubs and trees.  A handful of this dirt that is either dry or muddy indicates the plant is underwatered or overwatered.
Folsom Weather:  August Average High - 92°F Average Low - 61°F, Average Precipitation 0.03 in.
Perennial Division:  Now is a good time to think about what perennials may need dividing. Look for these signs: the center of the plant has died out, the plant is no longer flowering as profusely as before and the plant is filling in on the growing space of other plants.

Grass Mulch:  If you use grass clippings as mulch around trees and shrubs, let them dry out thoroughly to prevent matting and rotting.
Houseplants:  Gradually move houseplants that have been summering outdoors into shadier locations so they can prepare for lower light levels. Be sure to check for bugs before bringing indoors.