Spring Landscaping Prep: Lawn Care and Garden Tasks for March Through May

Getting Your Yard Out of Winter Mode

Spring yard work isn’t about making things look pretty right away — it’s about setting up the soil, grass, and plantings to thrive through summer. Rush the process and you’ll fight weeds, dead patches, and stressed plants all season long. Time it right and you’ll spend less effort and money from June onward.

This guide covers lawn care, garden bed prep, tree and shrub maintenance, and irrigation setup from March through May. I’ve organized tasks by month so you can plan your weekends without cramming everything into one Saturday.

March: Cleanup and Assessment

Rake and Dethatch the Lawn

Start by raking out dead grass, matted leaves, and winter debris. If your lawn has a thatch layer thicker than 1/2 inch (that spongy mat of dead grass between the soil surface and the green blades), you need to dethatch. Thatch blocks water, fertilizer, and air from reaching the roots.

For small lawns, a dethatching rake ($30–$50) works fine. For lawns over 3,000 square feet, rent a power dethatcher from a home improvement store ($60–$90 per day in 2026). Run it in two directions across the lawn for thorough coverage, then rake up the debris.

Test Your Soil

A soil test tells you exactly what your lawn and garden beds need instead of guessing with fertilizer. Understanding your soil is as important for your yard as understanding mortgage terms is for your finances. Most county cooperative extension offices offer soil testing for $10–$25. Mail-in kits from private labs run $25–$50 and give more detailed results including micronutrient levels.

You’re looking for:

• pH level: Most turf grasses thrive at 6.0–7.0. Below 6.0, add lime. Above 7.5, add sulfur.
• Nitrogen (N): The primary growth nutrient — low levels mean thin, pale grass
• Phosphorus (P): Supports root development — important for new lawns and transplants
• Potassium (K): Helps grass resist disease, drought, and cold stress

Test results take 1–2 weeks, so send samples in early March to have results back before your first fertilizer application.

Inspect Hardscaping and Edging

Walk all pathways, retaining walls, and borders. Frost heave shifts pavers, cracks concrete, and tilts retaining wall blocks. Reset any displaced pavers by lifting them, adding or removing base material, and tapping them back into place. Re-set edging that’s been pushed out of alignment.

This is also a good time to assess your deck and patio condition — cleaning and repairs are easier before plants fill in around structures.

April: Feeding and Weed Prevention

Apply Pre-Emergent Herbicide

Pre-emergent herbicide stops weed seeds from germinating. Timing is everything — apply when soil temperatures at a 2-inch depth reach 55°F for three consecutive days. In most of the country, this falls between mid-March (Southeast) and late April (Upper Midwest and Northeast). Check your state’s cooperative extension for local timing recommendations.

Granular pre-emergent products cost $25–$45 per bag and cover 5,000–15,000 square feet depending on the brand. Apply with a broadcast spreader for even coverage. Water in lightly after application — the product needs to reach the soil surface to form its barrier.

Important: If you plan to overseed thin areas, do NOT apply pre-emergent to those spots. It will prevent your grass seed from germinating too. Tackle overseeding and pre-emergent in separate zones.

Fertilize the Lawn

Apply your first fertilizer based on soil test results. If you didn’t test, a balanced slow-release fertilizer (like a 10-10-10 or a turf-specific blend) is a safe starting point. In 2026, a bag of quality slow-release lawn fertilizer covering 5,000 square feet costs $25–$40.

Don’t fertilize warm-season grasses until they’ve fully greened up. Fertilizing dormant grass wastes product and feeds weeds instead.

Overseed Thin or Bare Spots

For cool-season grasses (bluegrass, fescue, ryegrass), spring overseeding works if you skip pre-emergent on those patches. Rough up the soil surface with a garden rake, spread seed at the rate listed on the bag, cover lightly with 1/8 inch of topsoil or peat moss, and keep the area consistently moist for 2–3 weeks until germination.

Warm-season grasses (bermuda, zoysia, St. Augustine) overseed better in late spring or early summer when soil temperatures are consistently above 65°F.

May: Mowing, Planting & Mulching

Start Mowing at the Right Height

The number one mowing mistake is cutting too short. Short grass stresses the plant, exposes soil to sunlight (which helps weed seeds germinate), and reduces the root system’s depth. Follow the one-third rule: never remove more than one-third of the blade height in a single mowing.

Sharpen your mower blades at the start of the season ($10–$15 at a hardware store or DIY with a file). Dull blades tear the grass rather than cutting it cleanly, leaving brown ragged tips that are vulnerable to disease.

Prep and Plant Garden Beds

Turn the soil in garden beds with a garden fork, breaking up any compacted areas. Mix in 2–3 inches of compost to rebuild organic matter depleted over winter. In 2026, a cubic yard of bulk compost runs $30–$50 delivered, covering roughly 100 square feet at 3 inches deep.

Plant annuals after your area’s last frost date. Perennials, shrubs, and trees can go in earlier since they tolerate light frost. Space plants according to their mature size, not their nursery pot size — overcrowding leads to disease pressure and competition for water.

Mulch Everything

Apply 2–3 inches of mulch around trees, shrubs, and garden beds. Mulch retains soil moisture, suppresses weeds, and regulates soil temperature. Keep mulch 3–4 inches away from tree trunks and plant stems to prevent rot and pest harborage.

Hardwood mulch costs $30–$45 per cubic yard in 2026. One cubic yard covers about 160 square feet at 2 inches deep. For large properties, buying in bulk from a mulch yard saves 30–50% versus bagged mulch from a box store.

Tree and Shrub Care

Prune Before New Growth

Late winter through early spring (before buds break) is the ideal pruning window for most deciduous trees and shrubs. Remove dead, damaged, and crossing branches. For flowering shrubs, timing matters:

• Spring-flowering shrubs (forsythia, lilac, azalea): Prune immediately after they finish blooming — they set next year’s flower buds on this year’s new growth
• Summer-flowering shrubs (butterfly bush, crape myrtle, hydrangea): Prune in late winter or early spring before new growth starts
• Evergreens: Light shaping in spring is fine; avoid heavy pruning that removes more than 25% of the canopy

For trees taller than 15 feet or any branch near power lines, hire a certified arborist ($300–$800 for a standard pruning job). DIY tree work above ladder height is one of the most dangerous home maintenance activities. Falls from ladders account for over 160,000 emergency room visits annually in the U.S.

Check for Winter Damage

Ice storms, heavy snow, and deer browsing all take their toll. Look for cracked or split branches, bark damage on trunks, and root heave (where frost pushed the root ball partially out of the ground). Small trees and shrubs with root heave should be pressed back into place and re-staked if needed.

If a major limb split but is still partially attached, have it professionally removed. DIY removal of large hung limbs is dangerous and can cause further trunk damage if done incorrectly.

Irrigation System Startup

If you have an in-ground irrigation system, spring startup involves several steps:

1. Turn on the main supply slowly. Open the valve gradually over 30–60 seconds to prevent water hammer (pressure spikes that damage pipes and fittings).
2. Walk each zone manually. Run every zone for 2–3 minutes and inspect every sprinkler head. Look for heads that don’t pop up, spray in the wrong direction, or leak at the base.
3. Replace broken heads. Pop-up spray heads cost $3–$8 each. Rotor heads (for larger areas) run $10–$25. Keep a few spares in your garage.
4. Adjust spray patterns. Realign heads that spray onto sidewalks, driveways, or the house. Watering hardscape is a direct waste of water and money.
5. Check the controller. Update the watering schedule for spring — most lawns need 1 inch of water per week including rainfall. Set zones for early morning (4:00–7:00 AM) when evaporation is lowest.

A professional spring irrigation startup runs $75–$150 in 2026. For homeowners planning to sell their home, a well-functioning irrigation system is a visible selling point — buyers notice brown, patchy lawns immediately.

Spring Landscaping Budget Breakdown

Common Spring Landscaping Mistakes

After 20+ years of seeing homeowner lawns, here are the patterns that cause the most problems:

• Mowing too early: Wait until the grass has actively started growing and reaches 3+ inches. Mowing dormant or barely emerging grass stresses the root system.
• Over-fertilizing: More fertilizer does not mean greener grass. Excess nitrogen burns the lawn, pollutes waterways, and creates rapid top growth with weak roots.
• Watering too often and too shallow: Daily light watering trains roots to stay near the surface. Instead, water deeply (1 inch) two to three times per week to encourage deep root growth.
• Planting too early: Tender annuals and warm-season vegetables planted before the last frost date usually die. Check your USDA hardiness zone and local frost dates.
• Volcano mulching: Piling mulch against tree trunks creates moisture and rot problems at the trunk base. Keep mulch in a donut shape, not a volcano shape.

Connecting Landscaping to Home Value

Landscaping is one of the highest-ROI exterior investments you can make. The National Association of Realtors estimates that well-maintained landscaping adds 5–12% to a home’s perceived value. For a $400,000 home, that’s $20,000–$48,000 in buyer perception — far more than the $1,000–$3,000 most homeowners spend on spring prep. Your home equity benefits directly from consistent yard care.

If you’re preparing to list your home, focus spring efforts on curb appeal: fresh mulch, edged beds, green lawn, and trimmed shrubs. These cost hundreds but influence buyers’ first impressions more than many interior upgrades.

Buyers who are shopping for homes should pay attention to the landscaping condition during showings. A neglected yard often signals deferred maintenance elsewhere. Use our home maintenance calculator to estimate ongoing yard care costs after purchase.

For related seasonal tasks, pair this landscaping guide with the full spring home maintenance checklist covering roof, foundation, HVAC, and plumbing inspections. And when summer arrives, keep your outdoor spaces in shape with our deck and patio care guide.

Frequently Asked Questions

When is the best time to start spring lawn care?

Start cleanup and soil testing in early March when snow melts and ground thaws. Apply pre-emergent herbicide when soil temperature at 2 inches reaches 55°F (mid-March to late April depending on your region). Begin mowing when grass actively grows and reaches your target mowing height. Use your state’s cooperative extension for precise local timing.

How much water does my lawn need in spring?

Most turf grasses need about 1 inch of water per week, including rainfall. Use a rain gauge ($5–$10) or an empty tuna can placed on the lawn during watering to measure output. In spring, rainfall often handles most of this need. Supplement with irrigation only during dry stretches of 7+ days.

Should I aerate my lawn in spring?

Core aeration — pulling small plugs of soil to reduce compaction — is best done in early fall for cool-season grasses and late spring for warm-season grasses. Spring aeration of cool-season lawns can work but increases weed pressure because you’re opening the soil surface right when weed seeds are germinating. If you must aerate in spring, apply pre-emergent herbicide immediately after.

What’s the cheapest way to improve my lawn’s appearance?

Three low-cost actions make the biggest visual difference: (1) mow at the correct height with sharp blades — free if you already own a mower, (2) edge along sidewalks and driveways — a manual edger costs $25–$40, and (3) add fresh mulch to garden beds at $30–$45 per cubic yard. These three steps transform a yard’s appearance for under $100.

How do I fix large bare patches in my lawn?

For patches larger than 6 inches across, rough up the soil with a rake, add 1/4 inch of topsoil, spread grass seed matched to your existing lawn type, press the seed into contact with the soil using a roller or your feet, and keep the area moist for 14–21 days. For very large areas (over 500 square feet), sod installation ($1.50–$3.00 per square foot installed in 2026) gives faster results. Use our calculate monthly costs to see how landscaping improvements fit into your overall housing budget.

Do I need a professional for spring yard prep?

Most spring lawn and garden tasks are well within DIY range. Hire a pro for large tree pruning (safety risk), irrigation system repairs (technical), and grading/drainage work (requires equipment). A one-time spring cleanup from a landscaping crew costs $200–$500 depending on property size and condition. Compare that to the DIY cost of $450–$900 in materials without labor, and the math favors DIY for homeowners who have the time. Check our local contractors for vetted local contractors if you prefer to hire out.