Summer Land Management in New Jersey: Maintaining Cleared Property and Preventing Regrowth

What's regrowing and why

Three sources of summer regrowth appear on cleared NJ properties:

Root resprouts. Invasive species with established root systems — multiflora rose, autumn olive, Japanese barberry, and tree of heaven — can send up new shoots from root fragments and root crowns that survived the mulching. These resprouts are typically smaller and weaker than the original plants. They’re also vulnerable: a single mowing pass or spot herbicide application eliminates most of them. The mulch layer slows and weakens resprouts by blocking light, but some species push through regardless.

Seed bank germination. Seeds deposited in the soil over years of invasive growth germinate when light reaches the surface. Mile-a-minute vine, autumn olive seedlings, Callery pear seedlings, and annual weeds all emerge from the seed bank. The mulch layer suppresses most germination, but on thinner mulch sections or at the edges of the cleared area, seedlings find their way through.

Native succession. Not all regrowth is bad. Native grasses, goldenrod, asters, and wildflowers also emerge through the mulch. On properties where the goal is a meadow or natural ground cover, this native regrowth is desirable. The challenge is distinguishing native succession (let it grow) from invasive regrowth (remove it).

The summer maintenance schedule

June: First inspection. Walk the cleared property and assess what’s regrowing. Identify the species. If you see root resprouts from tree of heaven, knotweed, or bittersweet — these need immediate treatment because they grow fastest. Flag areas where invasive resprouts are concentrated. Note any areas where the mulch is thin and seeding is heavier.

July: First maintenance mow or treatment. By mid-July, resprouts are large enough to mow but small enough that a single pass eliminates them. A standard brush mower or rotary mower handles first-year resprouts easily — the stems are soft and under an inch in diameter. On properties with targeted species (knotweed, tree of heaven), apply herbicide to the regrowth rather than mowing — these species need chemical treatment to kill the root system.

August: Herbicide window. Late summer is the optimal timing for herbicide application on perennial invasives. The plants are actively translocating sugars and nutrients from the leaves to the root system for winter storage, which carries the herbicide to the roots. Triclopyr or glyphosate applied to foliage in August-September is more effective at root kill than the same application in spring or early summer. A licensed applicator handles this.

September: Second mow or spot-treat. Any resprouts that emerged after the July mow get caught in a September pass. By September, annual weeds are setting seed — mowing before seed drop prevents the seed bank from replenishing. On properties being seeded for permanent ground cover, September is also an excellent seeding window in NJ. Cool-season grasses (fescue, ryegrass) establish well in the still-warm soil of early fall.

Managing the mulch layer

The forestry mulch on your cleared property is decomposing through the summer. This is normal and beneficial — the mulch is converting into organic matter that enriches the soil. Here’s what to expect:

Months 1–3 (first summer). The mulch darkens from fresh light brown to a deeper brown. It compacts slightly. Fungal activity is visible on the surface — white mycelial threads are common and indicate healthy decomposition. These fungi are breaking down the wood fiber and are completely harmless.

Months 4–6. The mulch is noticeably thinner as decomposition accelerates in summer heat. A layer that started at three to four inches may be down to two inches. The underlying soil is becoming visible in thin spots, particularly where equipment tracked during clearing.

Months 6–12. By the end of the first year, the mulch is largely integrated into the soil surface. What remains looks like rich, dark organic matter rather than distinct wood chips. The soil underneath is measurably improved — more organic content, better moisture retention, better structure.

Don’t add mulch. Property owners sometimes ask about adding landscape mulch to the decomposing forestry mulch. This is unnecessary and counterproductive. The forestry mulch is doing its job — decomposing into the soil. Adding landscape mulch on top creates an excessively deep layer that can become anaerobic and impede new plant establishment.

Summer clearing: when it makes sense

Summer isn’t the ideal season for NEW clearing projects, but it’s far from impossible. The ground is firm (dry summer conditions are better than wet spring), and the equipment operates normally. The downsides:

Foliage density. Full leaf-out means reduced visibility. The operator can’t see as far through the vegetation, which slows clearing speed on wooded properties.

Heat. Operator fatigue is real on long summer days. Work typically runs 7 AM to 3 PM in summer rather than the full-day production schedule possible in cooler seasons.

Regrowth risk. Clearing in June means the cleared area has the full summer growing season ahead of it. Any species that resprouts has maximum time to reestablish before the first frost. Summer clearing usually requires a fall maintenance mow that wouldn’t be needed with fall or winter clearing.

When summer clearing makes sense: deadline-driven projects (construction, pool installation, property closing), emergency situations (fire hazard, safety clearance, code compliance), and tick-habitat reduction where the homeowner wants relief during the active Lyme season.