Quick answer
Plant trees and shrubs in autumn in mild climates and early spring in cold ones; prune dormant trees in late winter; aerate and overseed cool-season lawns in early autumn; and water deeply in summer rather than often.
Why season matters
Plants respond to soil temperature, day length and water. A task done at the wrong time is not neutral: pruning at the wrong time removes flower buds, fertilizing at the wrong time pushes tender growth into frost, and planting in summer raises water demand while roots are trying to establish.
The seasons below are a temperate-climate default. Adjust by your USDA hardiness zone and local extension calendar.
Spring: wake up and plant
Do
- Plant bare-root trees and shrubs early, before bud break.
- Divide perennials as new growth appears.
- Refresh mulch after the soil warms.
- Start irrigation and check every zone.
- Fertilize lawns based on a soil test.
Don’t
- Don’t prune spring-flowering shrubs before they bloom.
- Don’t work wet soil; it compacts.
- Don’t plant tender annuals before the last frost date.
Summer: water and watch
Do
- Water deeply and infrequently, early in the morning.
- Mow high and keep blades sharp.
- Deadhead annuals and some perennials.
- Mulch bare soil to hold moisture.
- Scout for pests and disease weekly.
Don’t
- Don’t fertilize cool-season grass in peak heat.
- Don’t water every day; shallow roots follow shallow watering.
- Don’t prune heavily in a drought; the plant cannot replace growth.
Autumn: the best planting season
Do
- Plant trees, shrubs and perennials.
- Aerate and overseed cool-season lawns.
- Clean up leaves and cut back spent perennials.
- Winterize irrigation in freezing climates.
- Mulch after the first hard frost.
Don’t
- Don’t prune spring-flowering shrubs in autumn; you remove next year’s flowers.
- Don’t fertilize woody plants late; tender growth will freeze.
- Don’t leave a thick leaf mat on the lawn.
Winter: structure and planning
Do
- Prune dormant trees and shrubs.
- Check drainage and downspouts.
- Protect trunks from rodents and sunscald.
- Sharpen and service tools.
- Plan next year’s changes and get quotes before spring.
Don’t
- Don’t walk on frozen or saturated lawns.
- Don’t prune in extreme cold; wounds can shatter.
- Don’t apply salt near beds without a plan.
Climate adjustments
| Climate | Key difference |
|---|---|
| Cold continental | Short growing season; plant early spring, avoid autumn planting of tender species |
| Mild maritime | Autumn and winter planting work; drainage matters more than cold |
| Hot arid | Plant at the start of the rainy season; shade new plants; mulch heavily |
| Humid subtropical | Autumn planting; watch fungal disease in summer |
| Mediterranean | Autumn planting; summer irrigation is essential for establishment |
A simple annual calendar
- January–February: prune dormant trees, plan, order plants.
- March–April: plant, divide, mulch, start irrigation.
- May–June: water, mow, deadhead, scout pests.
- July–August: water, mulch, avoid heavy pruning, harvest.
- September–October: plant, aerate, overseed, clean up.
- November–December: winterize, protect, prune, plan.
Next: maintenance checklist · fruit tree pruning timing.
FAQ
What is the best season to landscape?
Autumn is best in most temperate climates: soil is warm, air is cool, and rainfall is more reliable. Spring is the second choice. In hot, dry climates, plant at the start of the rainy season or in early autumn.
When should I prune shrubs?
Prune spring-flowering shrubs right after bloom; prune summer-flowering shrubs in late winter or early spring. Evergreens are usually pruned in late spring after new growth hardens.
Should I water in winter?
In mild, dry climates, yes — evergreens and new plantings can dry out in winter. In freezing climates, water before the ground freezes and then leave dormant plants alone.