How to Clear an Overgrown Garden in Stages
How to clear an overgrown garden: make a plan, mark the plants worth saving, then remove dead plants plus weeds one section at a time. Washington State University Extension notes renovation can take months or years. Divide crowded perennials, prune shrubs gradually plus mulch cleared areas.
The short answer
Clear an overgrown garden in stages. Washington State University Extension advises marking the plants worth saving, starting with a small area, removing dead or diseased plants plus pulling all weeds. Then divide crowded perennials, prune large shrubs gradually plus finish with a layer of mulch. Renovation can take months or even years.
How do you decide which plants to save?
Washington State University Extension advises choosing a vision first, then marking what stays. If the garden is new to you, waiting a year can reveal bulbs, self seeding annuals or a shrub with fine fall color. Taking photos through the year records which plants to save plus which to remove.
| Stage | Task | Notes |
|---|---|---|
| Plan | Mark plants to save | Start with a small area (Washington State University Extension) |
| Clear | Remove dead plants plus pull weeds | Weeds compete for water (Washington State University Extension) |
| Divide | Split crowded perennials | Each division needs 3 to 5 shoots (University of Minnesota Extension) |
| Prune | Remove a third of old stems a year | Spread over 3 years (Iowa State University Extension) |
| Finish | Mulch cleared beds | Holds moisture plus slows weeds (Washington State University Extension) |
Source: Washington State University Extension, University of Minnesota Extension plus Iowa State University Extension.
What should be cut back first?
Start with dead material. Washington State University Extension advises removing dead or diseased plants, volunteers plus underperformers, pulling all weeds plus cutting a clean edge between border plus lawn. On shrubs, it advises cutting out dead plus crossing limbs plus water sprouts before any other pruning.
Why clear an overgrown garden in stages?
Shrubs recover better. Iowa State University Extension notes overgrown deciduous shrubs can be renewed over 3 years by removing a third of old stems each late winter. University of Maryland Extension notes staggering renewal pruning over several years lessens plant shock. Working by section also prevents feeling overwhelmed.
How to: step by step
- Tour the garden plus flag plants to save.
- Remove dead, diseased plus unwanted plants.
- Weed plus cut a crisp bed edge.
- Divide crowded perennials in the right season.
- Thin overgrown shrubs a third at a time.
- Mulch cleared ground until replanting.
Troubleshooting
Weeds return quickly: roots left in soil. Dig roots plus mulch.
Shrubs look bare after pruning: too much removed at once. Thin in stages.
Perennials bloom poorly: crowding. Split the clumps.
For related reading see fall garden cleanup after cannabis harvest, weed control in outdoor cannabis plus composting cannabis garden waste. Kind Seed Co also stocks cannabis seeds.
Sources
- Managing an overgrown garden, Washington State University Extension
- Pruning large, overgrown shrubs, Iowa State University Extension and Outreach
- Pruning shrubs and hedges in the home garden, University of Maryland Extension
- Dividing perennials, University of Minnesota Extension
FAQ
When should I clear an overgrown garden?
Timing depends on the task. Iowa State University Extension advises renewal pruning of deciduous shrubs in late winter or early spring, in March or early April. University of Minnesota Extension notes spring is a good time to divide many perennials. Dead plants plus weeds can come out any time.
What if large shrubs are past saving?
Some cannot be cut back hard. Iowa State University Extension notes junipers, pines plus boxwood cannot grow from bare branches, so they should be pruned only to green areas or removed plus replaced. Lilac, forsythia plus dogwood can be cut to 4 to 6 inches from the ground in early spring.
How do you divide crowded perennials?
University of Minnesota Extension advises digging up the clump with a spade or fork, then pulling the roots apart by hand or cutting them with a knife or spade. Each division should have three to five vigorous shoots plus plenty of roots. Divide on a cloudy day plus replant promptly.
How long does it take to reclaim a garden?
Washington State University Extension notes renovation can take months or even years, so start with a smaller area plus work through gradually. Iowa State University Extension notes renewal pruning of overgrown shrubs runs over 3 years, plus some lilacs pruned hard will not bloom for 3 to 5 years.
Should I wait before changing a new garden?
Washington State University Extension advises waiting a year before drastic changes to a garden that is new to you. Hidden bulbs plus self seeding annuals may appear. Meanwhile, cut out dead material, weed plus cut a clean border edge while you plan the design.
