Spring in Iowa is equal parts exciting and unpredictable. One day it feels like gardening season has arrived, and the next we’re back to frost warnings. If you garden in USDA Zone 5, a little planning now will set you up for a healthier, more successful growing season.
This step-by-step spring gardening checklist for Iowa gardeners will help you prepare your landscape, lawn, vegetable garden, and containers—without jumping the gun.
When Does Spring Gardening Start in Iowa?
In most of Iowa, spring garden prep begins late March through April, depending on weather conditions. Our average last frost date falls between April 25 and May 10, but soil temperature matters more than air temperature for many tasks.
Pro Tip: Avoid working wet soil. If it forms a muddy ball in your hand, wait—it can cause compaction that lasts all season.
Early Spring Garden Cleanup (Late March–Early April)
Once snow has melted and the ground begins to thaw, it’s time for a gentle cleanup.
• Remove fallen branches, trash, and winter debris
• Cut back ornamental grasses and perennials
• Leave healthy leaves in garden beds as mulch if possible
• Check trees and shrubs for broken or winter-damaged branches
Leave the leaves: Pollinators and beneficial insects often overwinter in leaf litter and hollow stems. Waiting a bit helps protect them.
Pruning Trees and Shrubs in Spring
Early spring is ideal for pruning many landscape plants—but not all of them.
Safe to Prune in Early Spring:
• Shade trees
• Fruit trees (before bud break)
• Summer-flowering shrubs (spirea, potentilla, hydrangea paniculata)
Do NOT Prune Yet:
• Lilacs
• Forsythia
• Magnolias
• Spring-flowering shrubs (wait until after bloom)
If you’re unsure, ask before you cut—timing makes a big difference in flowering and plant health.
Lawn Care Spring Checklist for Zone 5
A healthy lawn starts with patience.
• Rake lightly to remove debris (avoid aggressive dethatching)
• Repair snow mold or winter damage
• Apply a slow-release fertilizer once grass starts actively growing
• Delay crabgrass preventer until soil temps reach about 55°F
Avoid heavy foot traffic on soggy turf—it can cause long-term compaction.
Soil Prep & Garden Bed Refresh
Healthy soil is the foundation of every successful garden.
• Test soil if you haven’t in the last 2–3 years
• Add compost or aged manure to garden beds
• Top beds with 1–2 inches of organic matter
• Edge beds to keep mulch and soil in place
Spring is also a great time to refresh mulch—but wait until soil has warmed slightly to allow roots to wake up.
Vegetable Garden: What You Can Plant Early in Iowa
Cool-season crops can handle chilly nights and even light frost.
Plant in April:
• Lettuce
• Spinach
• Kale
• Peas
• Radishes
• Broccoli & cabbage transplants
Wait Until May for:
• Tomatoes
• Peppers
• Cucumbers
• Squash
• Basil
Always check soil temperature and long-range forecasts before planting tender crops.
Container & Raised Bed Prep
Before filling containers:
• Empty old soil if disease was present last year
• Sanitize pots with mild soap and water
• Use fresh, high-quality potting mix
• Check drainage holes
Raised beds warm faster than in-ground gardens, making them ideal for early planting.
Spring Pest & Disease Prevention
The best defense is early observation.
• Clean up diseased plant material from last season
• Watch for signs of fungal issues during wet weather
• Apply dormant oil sprays before buds open if needed
• Encourage beneficial insects by delaying excessive cleanup
Healthy plants are naturally more resistant to pests and disease.
Spring Garden Planning Tips
Before buying plants:
• Review what worked (and didn’t) last year
• Measure sun exposure as trees leaf out
• Plan spacing to avoid overcrowding
• Choose plants suited to Zone 5 and Iowa weather extremes
A little planning now saves time, money, and frustration later.
Need Help Getting Your Garden Spring-Ready?
Whether you’re tackling spring cleanup, planning a new landscape, or choosing the right plants for Iowa conditions, our team is here to help.
Stop by Ted Lare Garden Center, or connect with our landscape design experts to make this your best gardening season yet.
Happy planting!
