Fall has a way of making us want to clean everything up.
Leaves are falling. Perennials are turning brown. Flower stems are leaning over. Beds that looked full and green a few weeks ago can suddenly look tired.
The natural reaction is to grab the pruners, rake, and trash bags and clean the garden from one end to the other.
I would resist that urge.
After years of working with plants, I have learned that a good fall cleanup is not about making every bed perfectly clean. It is about knowing what needs to go and what should stay.
Some plants benefit from being cut back. Diseased material should usually be removed. But leaves, seed heads, stems, and healthy plant material can also protect the garden and provide shelter for wildlife.
In other words, we need to clean with a purpose.
DO: Keep Some of Those Fallen Leaves
One of the best things you can do this fall may be to do less.
Fallen leaves are valuable.
When leaves fall in garden beds, they create a natural layer of mulch. That layer can help protect the soil, slow moisture loss, and add organic matter as the leaves break down.
But there is another reason to keep them.
Many beneficial insects spend winter in leaf litter. Butterflies, moths, native bees, and other small creatures may use fallen leaves as shelter. Penn State and Illinois Extension both recommend leaving some leaves and plant material in garden areas to support insects through winter.
That does not mean you have to leave your entire yard buried in leaves.
A thick layer of wet leaves can smother turf.
Instead, rake leaves from lawns, sidewalks, and driveways into shrub beds, wooded areas, or perennial gardens. You can also create a leaf pile in an out-of-the-way corner.
The leaves stay on your property and continue working for you.
That is much better than treating them as trash.
DON’T: Cut Every Plant to the Ground
For years, many of us treated fall cleanup almost like clearing a field.
Cut it down.
Rake it out.
Haul it away.
We now have good reasons to be more selective.
Standing stems can provide shelter for insects. Seed heads can provide food for birds. Ornamental grasses and dried flowers can also add texture to an otherwise empty winter landscape.
Coneflowers are a good example.
The flowers may be finished, but the seed heads can remain useful long after blooming stops.
Ornamental grasses are another plant I often prefer to leave standing. They move in the wind and give us something to look at during winter.
Then we can cut them back before spring growth begins.
DO: Remove Diseased Plant Material
Leaving plant material does not mean we should leave everything.
There is a big difference between healthy dormant growth and diseased foliage.
If a plant had a serious leaf spot, fungal disease, or pest problem during the growing season, I usually want that material out of the bed.
Do not give a disease a comfortable place to spend the winter.
Remove badly infected leaves and stems and dispose of them.
I also would not use heavily diseased plant material as garden mulch.
A little extra cleanup now can save us trouble next year.
What About Hostas?
Hostas deserve special attention because they are often included in advice telling gardeners not to cut anything back.
You certainly do not have to rush outside at the first cool night and remove hosta leaves.
Let the plant naturally decline.
But after frost has damaged the foliage and the leaves have collapsed, cleaning them up can make sense.
University of Minnesota Extension recommends removing dead hosta leaves in late fall. Illinois Extension also notes that dead hosta foliage can shelter slug eggs and may hold disease problems from one season to the next.
So I would not make a blanket rule that hostas must remain untouched all winter.
Watch the plant.
Once the leaves are dead and mushy, there is usually little benefit in keeping them around the crown.
Ferns Are Different
Ferns need a little more judgment.
Some ferns stay green or partly green during winter. Others naturally die back.
If the fern is evergreen, leave the healthy foliage alone. It is still doing its job and adding color to the garden.
If you have a deciduous fern that has completely died back, you can remove old fronds if you want a cleaner appearance.
You can also leave them until late winter.
There is usually no reason to rush.
That is one of the big lessons of fall gardening.
We do not have to finish everything in October or November.
DON’T: Cut Back Cast-Iron Plants Just Because It Is Fall
Cast-iron plant, or Aspidistra, is another plant where timing matters.
It is tough. That is how it earned its name.
But it is also slow growing.
That means we do not want to remove good foliage without a reason.
If you see an old, damaged, yellow, or ugly leaf, remove that leaf near the base.
That is fine.
What I would not recommend is automatically shearing the entire plant to the ground during fall cleanup.
University of Florida guidance recommends removing old foliage in spring. Clemson Extension suggests removing weathered leaves one at a time or cutting an entire clump back every two or three years in late winter when rejuvenation is needed.
That makes much more sense.
Aspidistra can take time to refill an empty space. If we remove healthy leaves unnecessarily, we may spend months waiting for the bed to look full again.
So with cast-iron plants, be selective.
Take the bad leaves.
Keep the good ones.
DO: Leave Some Stems Standing
One of the easiest changes we can make is leaving some perennial stems through winter.
They may look dead to us.
They may not be dead space to an insect.
Hollow and pithy stems can become winter habitat for native bees and other beneficial insects. Butterflies and moths may also spend part of their life cycle among dried plants and fallen leaves.
You do not have to leave every stem.
Maybe keep the back half of a garden more natural while cleaning the front edge.
Maybe leave stems in a pollinator bed while keeping the area near the front door neat.
There is plenty of room for compromise.
A garden can look cared for without looking sterile.
DON’T: Let Leaves Smother Everything
“Leave the leaves” is good advice, but even good advice can be taken too far.
A light, loose layer in a garden bed can be helpful.
A thick, wet mat can cause problems.
Heavy leaves can block light from turf. They can hold too much moisture around certain plants. Large leaves can also mat together instead of breaking down quickly.
Move excess leaves where they can do more good.
Shred some if needed.
Put them around trees and shrubs.
Add them to a compost pile.
Make leaf mold.
The goal is not to create the biggest pile possible. The goal is to keep a useful natural resource on the property.
DO: Wait Until Spring for Some Cleanup
There is no rule saying the entire garden must be finished before winter.
In fact, I like spreading the work out.
Fall is a good time to remove diseased plants, clean vegetable beds when needed, manage fallen leaves, and handle obvious problems.
Spring can be the time for cutting back ornamental grasses, removing remaining perennial stems, and cleaning around plants as new growth begins.
This approach is easier on us.
It can also be easier on the wildlife living in our gardens.
A Little Mess Can Be a Good Thing
I think we have spent too many years trying to make our gardens look like nothing lives in them during winter.
Nature is not that clean.
A healthy landscape has leaves.
It has stems.
It has seed heads.
It has insects tucked into places where we cannot see them.
That does not mean your yard has to look abandoned. We can still edge beds, clear walks, remove diseased plants, and keep important areas neat.
But we can also leave a few leaves under the shrubs.
We can let the ornamental grasses stand.
We can keep some seed heads for the birds.
And we can wait until late winter or spring before cutting back plants that do not need our attention yet.
That is the kind of fall cleanup I prefer.
Less cutting for the sake of cutting.
More thought about why we are doing it.
When we work with the natural cycle of the garden instead of trying to erase it, we usually end up with healthier soil, more wildlife, and a garden that is ready to come back to life when spring arrives.
Let the Garden Rest
Fall does not have to mean stripping the garden bare.
Think of it as getting the garden ready to rest.
Save some leaves. Remove diseased material. Leave useful stems and seed heads standing. Be careful before cutting slow-growing evergreen plants such as cast-iron plant.
Most of all, do not worry if the garden looks a little wild.
There is a lot happening underneath those leaves and inside those stems.
Sometimes the best fall garden cleanup is knowing when to put the pruners down.