A Quick Reference Pruning Calendar for the Midwest
When to Prune for Health, Structure, and Flowers
Midwest weather is unpredictable, but plant biology is not. Pruning is where all the mistakes in the garden are made. It is rarely done correctly even by professionals and can cost you the health of your trees, shrubs and garden when done improperly. Use this calendar as a general guide, adjusting slightly for unusually early springs or extended cold.
Late Winter (February)
Best time for major pruning
Prune now:
• Most deciduous trees (oak, maple, honeylocust, elm*)
• Summer-flowering shrubs (panicle hydrangea, rose of Sharon, buttonbush)
• Fruit trees (apple, pear)
• Roses (except climbers)
Why:
Plants are dormant, structure is visible, and cuts heal cleanly in spring.
Avoid:
• Spring-flowering shrubs
• Pruning during extreme cold snaps
* Note: Avoid pruning oaks from April–July to prevent oak wilt
Early Spring (March–April)
Light cleanup only
Prune now:
• Broken, damaged, or crossing branches
• Evergreens (light shaping only)
• Perennials once new growth appears
Designer tip:
Let perennials emerge before cutting—you’ll know exactly where to prune.
After Spring Bloom (May–Early June)
Protect next year’s flowers
Prune now:
• Lilac
• Forsythia
• Serviceberry
• Magnolia
• Viburnum (spring-blooming types)
Why:
These plants bloom on old wood. Pruning later removes next year’s buds.
Early Summer (June)
Selective, corrective pruning
Prune now:
• Minor shaping of shrubs
• Suckers and water sprouts
• Light thinning for airflow
Avoid:
• Heavy pruning in heat or drought
• Oak trees (oak wilt risk)
Mid–Late Summer (July–August)
Mostly hands off
Prune only if needed:
• Storm damage
• Dead or hazardous branches
Why:
Heavy pruning now stresses plants and encourages tender growth that won’t harden off before winter.
Early Fall (September)
Resist the urge
What not to prune:
• Trees and shrubs (unless damaged)
• Woody perennials
Why:
Fall pruning can trigger new growth vulnerable to early freezes.
Late Fall–Winter (October–January)
Minimal pruning
Prune only:
• Dead, diseased, or dangerous limbs
• Structural issues discovered after leaf drop
Best practice:
Wait until late winter for anything more than safety pruning.
Special Midwest Notes
• Oak Trees:
Never prune April–July due to oak wilt risk.
• Hydrangeas:
Know your type—some bloom on old wood, some on new.
• Native Plants:
Many benefit from spring pruning rather than fall cleanup for wildlife value.
Good pruning isn’t about cutting—it’s about timing. Use this calendar to guide your decisions, and your landscape will reward you with healthier plants, stronger structure, and better blooms.
