The American Organic Gardener's December To-Do List

Everything that needs to be done in the dirt this month, wherever you live.

November 30, 2017
snowy garden

Here's your October gardening guide for North America's USDA Plant Hardiness Zones: 3-10. (Did you know that the USDA Hardiness Zones have changed?)

If you don’t know what USDA Plant Hardiness Zone you live in, check the map here to find out.

We've left off zones 1–2 (far-north Alaska) and zones 11–13 (small section of the Florida Keys, the Pacific coast between L.A. and Mexico, and Hawaii) since zones 3–10 cover 99 percent or more of the gardeners in the U.S.

(Whether you're starting your first garden or switching to organic, Rodale’s Basic Organic Gardening has all the answers and advice you need—get your copy today!)

bird eating in winter
Zone 3
  • Restock bird feeders.
  • Twist and coil long stems of Virginia creeper into a Christmas wreath base.
  • Check stored vegetables, tubers, and bulbs; remove any spoiled ones immediately.
  • Try to keep roses and other half-hardy perennials covered with snow—it's the perfect insulator against cold.
  • Start seeds of zonal geraniums (Pelargonium spp.).
  • Review your notes from the last growing season.
  • Begin planning next year's garden.
  • Browse through new seed catalogs and order early to avoid disappointment.

Related: The 15 Best Seed Catalogs For Organic Gardeners

potted herbs by the kitchen sink
Margaret Johnson / EyeEm/getty
Zone 4
  • On a warm day, trim back and mulch perennials.
  • Collect the seeds from pods and seedheads gathered earlier—wrap up some to give as holiday gifts.
  • Check stored veggies—discard any with signs of spoilage.
  • Continue harvesting greens from the hoop house or coldframe.
  • Try growing salad greens and herbs in pots in a south-facing window.
  • Take photos of your property to decide what needs changing before snow cover obscures your view.

Related: How To Have A Stunning Garden In The Middle Of Winter

throwing away christmas tree
Laura Stone/shutterstock
Zone 5

Related: How To Keep Your Christmas Tree Fresh And Green These Holidays

coldframe for plants
Bildagentur Zoonar GmbH/ Shutterstock
Zone 6
  • As weather permits, continue to harvest leeks and kale.
  • Keep straw snuggled around any crops still in the garden.
  • If using a coldframe to grow greens through winter, rig a plastic tunnel over the frame for extra warmth.
  • After the holidays, remove the branches from your cut Christmas tree and lay them over perennials and fall-planted pansies.
  • Divide overgrown Boston ferns: Cut the rootball in half with a sharp knife, then repot.
  • Cut back asparagus fronds.
  • Refill bird feeders as needed.

Here are 10 herbs you can grow inside all year long:

raking leaves
James Ballantyne / EyeEm/Getty Images
Zone 7
  • Remember it's your last chance to gather leaves for mulching, composting, or digging into the soil.
  • If weather is mild, feed pansies, snapdragons, and other winter flowers.
  • Cover strawberries with a floating row cover—they'll fare better over winter and bear earlier next spring.
  • Have row covers or burlap ready to protect camellias, Confederate jasmine, and fig trees, if temperature threatens to drop below 20ºF.
  • Add a second layer of row cover to protect leafy vegetables, such as spinach, lettuce, and collards (remove the covers during the day, and they'll continue to produce).
  • Place a few plastic jugs filled with water between rows to collect heat during the day and radiate it back at night.
  • Plant bareroot trees.

Related: 5 Best Native Flowering Trees For A Small Yard

planting bulbs
Zone 8
  • Continue planting onions, chives, spinach, mustard, peas, beets, and radishes.
  • Plant more lettuce in the coldframe.
  • Plant petunias, calendulas, annual candytuft (Iberis umbellata), pansies, sweet alyssum (Lobularia maritima), cornflowers (Centaurea cyanus), stocks (Matthiola incana), scabiosa (Scabiosa atropurpurea), verbena, pinks (Dianthus spp.), and daisies.
  • Plant bulbs, corms, and rhizomes of iris (Iris danfordiaeI. histrioidesI. reticulata), amaryllis, anemone (Anemone coronaria, A. sylvestris), calla, and liriope.
  • Clean up garden debris to eliminate overwintering areas for diseases and insect pests.
  • Start to build beds for spring by adding lots of compost.
  • Plant bareroot trees, shrubs, roses, and vines.
planting a tree
Zone 9
  • Apply lime-sulfur spray to peaches and nectarines to combat peach leaf curl.
  • Apply a dormant oil spray to fruit trees to kill insects and eggs.
  • Sow winter cover crops, including annual rye grass (Lolium multiflorum), fava beans (Vicia faba), oats, barley, pearl millet (Pennisetum americanum), or proso millet (Panicum miliaceum).
  • At month's end, plant perennials, shrubs, and trees.
  • Also at the end of the month, begin to prune established deciduous trees and shrubs to remove crossed and diseased branches and to open up the center to light and air.

Related: 8 Gardening Tasks You Should Do This Winter

planting brussels sprouts
Zone 10
  • At the beginning of this month, start cold-loving veggies, such as Brussels sprouts and English peas.
  • Most citrus fruits ripen now—remove and compost old fruit or use for slug traps.
  • Feed mangoes a shot of compost tea as soon as flower spikes appear.
  • If rainfall is scarce, provide at least 1 inch of water per week.
  • If frost threatens, be prepared to protect plants with row covers.
  • Keep harvesting beans, beets, broccoli, carrots, greens, onions, potatoes, radishes, and melons.