489-October Gardening Checklist | 10 Things to Do Now

Joe Lamp'l of the Joe Gardener Show runs through ten October tasks. The checklist is practical and seasonal. None of it touches money, health, or the life transitions this briefing usually covers. If you garden, a few of these are worth acting on this weekend.

Deer and young trees. Male deer rub antlers on soft-barked trees during October and November. Once they strip bark all the way around a trunk, the cambium layer that moves water and nutrients is gone and the tree dies. Dogwoods, redbuds, Japanese maples, any trunk under roughly four inches in diameter are the targets. Lamp'l wraps them proactively with corrugated drainage tubing, cut lengthwise and pried open around the trunk from the ground up to where branches begin. One afternoon, low cost, permanent protection for a tree you may have spent years establishing.

Fall planting windows. Warm soil and cool air together reduce transplant stress in ways spring planting does not. That makes October the right time to divide hostas, daylilies, iris, coneflowers, and garden phlox (divided sections get six to seven months of root growth before spring), to plant garlic cloves flat-side down about two inches deep (October in the northern US, as late as January further south, harvest mid-summer), and to put in daffodils, crocus, muscari, and other spring bulbs in holes roughly three times the depth of the bulb.

A few others worth noting. For fall lawn feeding, Lamp'l favors a slow-release fertilizer like Milorganite over synthetic soluble fertilizer, which releases all at once and pushes new top growth just as grass is winding down. For new trees and shrubs, dig the hole two to three times wider than the root ball but slightly shallower, and backfill with native soil only. Amended soil in the hole encourages roots to stay in the fluffy mix rather than growing outward. For leaves: move them off the lawn into garden beds rather than bagging them. Caterpillars overwinter in fallen leaves and are the primary protein source for nesting birds in early spring. If a landscaper or HOA rule is sending bagged leaves to a landfill, that's a reason to redirect them instead.

If you don't garden, nothing here requires action this week.

Joe Lamp'l of the Joe Gardener Show walks through 10 October gardening tasks — from protecting young trees against deer damage to planting garlic and spring bulbs. The episode is practical and seasonal, aimed at home gardeners across climate zones. There is nothing here related to money, health, or the life transitions that normally anchor this briefing, but if you garden, the checklist has real, actionable value.

What was covered

• Deer rutting protection: Male deer rub antlers on soft-barked trees (dogwood, redbud, Japanese maple, any trunk under roughly 4 inches diameter) in October and November, stripping bark down to the heartwood and killing branches — or the whole tree if they circle it. Joe Lamp'l recommends wrapping trunks proactively with stiff corrugated drainage tubing, cut lengthwise and pried open around the trunk, from the ground up to where branches begin.
• Lawn winterizing: Lamp'l recommends a slow-release, organic-derived nitrogen fertilizer (he uses Milorganite) rather than a synthetic soluble fertilizer, which would push new top growth just as the lawn is winding down. For cool-season grasses (fescue, bluegrass), he also recommends fall aeration, overseeding, and topdressing with about a half-inch of compost — what he calls "the trifecta."
• Frost blankets for cool-season vegetables: Have frost cloth on hand before a cold snap, not the day of. Lamp'l uses bent 10-foot PVC pipe as hoops inside raised beds to keep fabric off leaves, and seals the perimeter with boards or stones to trap ground warmth.
• Dahlia tubers: Dig and store tubers where soil freezes; store at roughly 43°F in sawdust or newspaper. Even where soil doesn't freeze, digging controls overcrowding and reduces powdery mildew. Replant when soil reaches about 50°F (around April 15 in his Atlanta-area Zone 8A).
• Dividing perennials: Lamp'l prefers fall division over spring because soil stays warm (promoting root establishment) while top growth is dormant (no competing demand on the plant). Hostas, daylilies, iris, coneflowers, and garden phlox are all candidates. Divided sections get six to seven months of root growth before spring.
• Leaving the leaves: Bagged leaves sent to landfills take with them overwintering caterpillars (a primary spring food source for nesting birds), lacewing eggs, ladybug larvae, lightning bugs, and other beneficial insects. Lamp'l's compromise: move leaves off the lawn into garden beds rather than removing them from the property.
• Planting garlic: Fall is the window — October in the northern US, as late as January further south. Plant individual cloves flat-side down, pointed end up, about thumb-depth (roughly 2 inches). Hardneck varieties suit colder climates; softneck stores longer and suits warmer regions. Harvest is typically mid-summer.
• Spring-flowering bulbs: Plant daffodils, crocus, muscari, dwarf iris, and fritillary now for early-spring color and pollinator food. Dig holes roughly three times the depth of the bulb. Lamp'l notes that deer ignored his daffodil planting entirely.
• Saving seeds from native perennials: Collect drying seed heads in October into organza (sheer fabric) bags; store in a cool, moderately humid space through winter; winter-sow in January for April germination.
• Fall planting of trees and shrubs: Dig the hole two to three times wider than the root ball but slightly shallower, so roughly a quarter to a third of the root ball sits above grade (water runs away from the root zone rather than pooling). Backfill with native soil only — no amended mix — so roots are encouraged to grow outward into surrounding soil.

Notable claims & predictions

• "Once they rub the bark off completely, that tree will absolutely die. The cambium layer — which transports water and nutrients — is gone." — Joe Lamp'l, on deer antler damage to young trees.
• "A synthetic soluble fertilizer releases its nutrients pretty much all at once. That's not what you want when the grass is going into dormancy." — Joe Lamp'l, making the case for slow-release organic fertilizer for fall lawn feeding.
• "University studies have proven that plants don't establish as well when you backfill with amended, improved soil, because the roots resign themselves to stay in the fluffy mix and don't continue to grow out into the native soil." — Joe Lamp'l, on tree planting technique.
• "The caterpillars overwintering in fallen leaves are the primary food source for birds when they need to feed their babies in early spring." — Joe Lamp'l, citing a well-established ecological argument for leaving leaves in place.
• "Fall is the best time to divide perennials — soil is still warm for root growth, but top growth is dormant, so there's no competing demand on the plant, and you gain six to seven months of root establishment before spring." — Joe Lamp'l.

Fact check

Deer rutting and cambium damage: Lamp'l's description is accurate. The cambium is the thin vascular layer just beneath bark that moves water and sugars; girdling (removing it completely around the trunk) does kill the tree. Widely confirmed in arboricultural and forestry literature. No issue.

Caterpillars as primary protein source for nestlings: This claim is well-supported by the work of entomologist Doug Tallamy (not cited in the episode but the scientific source behind this widely repeated claim). It is not an exaggeration, though "primary" slightly overstates certainty — caterpillars are the dominant but not exclusive protein source. The practical advice (leave leaves) stands.

Backfilling with native soil only: Lamp'l attributes this to "university studies" without naming them. The guidance itself is mainstream and consistent with cooperative extension recommendations from multiple land-grant universities, so the advice is sound even if the citation is vague.

Milorganite as a slow-release organic fertilizer: Accurate characterization. Milorganite is a heat-dried sewage biosolid product with a relatively low, slow-release nitrogen profile. It is not "organic" in the certified sense (it is a processed municipal byproduct), but Lamp'l uses the term loosely to mean non-synthetic, which is how it is commonly understood in home gardening. Worth noting if you apply organic certification standards to your garden.

No claims that fail scrutiny at a level warranting a false or misleading label.

Why this matters for you

• Deer damage is irreversible and happens fast. If you have young ornamental trees — dogwoods, redbuds, Japanese maples — the corrugated-tubing wrap Lamp'l describes is a low-cost, one-afternoon task that can prevent permanent loss of a tree you may have spent years establishing.
• Fall is genuinely the best window for several garden investments — dividing perennials, planting garlic, putting in spring bulbs — because warm soil and cool air reduce transplant stress. If you've been putting these off for spring, Lamp'l makes a solid case for doing them now instead.
• The "leave the leaves" argument has practical consequences for how you manage outdoor help or HOA obligations. If a landscaper or neighborhood rule is sending bagged leaves to a landfill, Lamp'l's point about overwintering beneficial insects gives you a reason to push back or redirect those leaves to a garden bed.
• Interesting and seasonally useful, but nothing here touches money, health decisions, or the major life transitions this briefing usually covers. If you garden, add the checklist to your weekend list; if you don't, there's nothing to act on this week.