Seasonal Maintenance Guide
- Cut back perennial stems and ornamental grasses in early spring
- Remove winter debris and clean up slug hiding places
- Divide and transplant overgrown perennials
- Plant new perennials after soil warms (April-May west, May-June east)
- Apply compost and organic fertilizer to beds
- Refresh mulch to 2-3 inches (avoid thick mulch that harbors slugs)
- Deadhead spent blooms regularly to encourage rebloom
- Water deeply during rare dry spells in western regions, regularly in eastern areas
- Monitor and control slugs and snails, especially after rain
- Stake tall perennials like delphiniums before they flop
- Cut back early bloomers like catmint for fall rebloom
- Remove diseased foliage promptly to prevent spread
- Plant spring bulbs like tulips and daffodils in October
- Divide and transplant perennials in early fall while soil is warm
- Plant winter-blooming plants like hellebores and winter pansies
- Continue deadheading until frost (later in western regions)
- Clean up garden debris but leave some for wildlife habitat
- Mulch tender plants in eastern Washington for winter protection
- Enjoy winter bloomers like hellebores and winter heather (western regions)
- Plan next season garden improvements
- Order seeds and plants for spring delivery
- Prune roses and deciduous shrubs in late winter (February-March)
- Clean and sharpen garden tools
- Western regions: minimal care needed; Eastern regions: check winter mulch