Seasonal Garden Tasks: A Month-by-Month Reference

Spring (March–May): Wake Up and Plant

Spring is the most action-packed season in the garden. Soil temperatures, not calendar dates, should guide your timing — most cool-season vegetables and perennial divisions can go in once soil consistently reaches 40–50°F at a 4-inch depth.

March

• Start seeds indoors: tomatoes, peppers, and eggplants need 6–8 weeks of indoor growth before transplanting.
• Cut back ornamental grasses to within 4–6 inches of the ground before new growth emerges.
• Apply dormant oil sprays to fruit trees and shrubs before buds break to smother overwintering insects — follow product label guidance carefully.

April

• Direct-sow cold-hardy crops — lettuce, spinach, peas, and radishes — 2–4 weeks before your last expected frost date.
• Divide and replant overcrowded perennials such as hostas and daylilies before they leaf out fully.
• Rake and dethatch lawns once the ground is firm and dry. Avoid working wet soil, which compacts easily.

May

• Transplant warm-season starts (tomatoes, squash, cucumbers) after your last frost date has reliably passed.
• Apply a slow-release, balanced fertilizer (e.g., 10-10-10 N-P-K ratio) to established beds after planting.
• Mulch beds 2–3 inches deep to suppress weeds and retain moisture heading into summer heat.

If you're just starting out, see our beginner's guide to vegetable gardening for planning and layout advice.

Summer (June–August): Maintain and Monitor

Summer shifts focus from planting to maintaining. Heat stress, pest pressure, and inconsistent watering are the main threats. Your goal is to keep plants consistently supplied with water, nutrients, and airflow.

June

• Water deeply and infrequently — most established plants prefer 1–1.5 inches of water per week, delivered in 2 sessions. Shallow, frequent watering encourages surface roots prone to drought stress. See common watering mistakes and how to fix them.
• Deadhead spent flowers on annuals and repeat-blooming perennials to encourage continued flowering.
• Side-dress vegetables with a nitrogen-rich fertilizer once plants begin to flower.

July

• Harvest regularly. Leaving mature vegetables on the plant signals it to stop producing. Check vines daily.
• Watch for pest and disease signs: yellowing leaves, stippled foliage (spider mites), or powdery coatings (fungal disease). Act at first notice before populations escalate.
• Prune spring-flowering shrubs (lilac, forsythia, azalea) no later than mid-July — buds for next year form on this season's new growth.

August

• Sow fall cool-season crops — broccoli, kale, and turnips — 8–10 weeks before your first expected fall frost.
• Stop fertilizing woody shrubs and trees to allow new growth to harden off before cold weather arrives.
• Evaluate container plantings and replenish nutrient-depleted potting mix with a liquid fertilizer. For detailed container care, see our container gardening guide.

Fall (September–November): Prep and Protect

Fall is cleanup and investment season. Tasks completed now pay dividends in spring by reducing pest carryover, improving soil structure, and protecting tender plants from winter damage.

September

• Plant spring-flowering bulbs (tulips, daffodils, alliums) 6–8 weeks before hard frost when soil cools to around 50°F.
• Overseed thin lawn areas. Soil is warm and moisture is increasing — ideal germination conditions for cool-season grasses like tall fescue and Kentucky bluegrass.
• Apply a fall lawn fertilizer high in potassium to strengthen root systems before dormancy.

October

• Cut back perennials selectively. Leave seed heads on rudbeckia, echinacea, and ornamental grasses through winter — they feed birds and add structure. Cut back diseased foliage promptly and dispose of it (do not compost).
• Dig and store tender bulbs — dahlias, cannas, and caladiums — after the first frost blackens their foliage.
• Drain and store hoses, irrigation lines, and clay pots before freezing temperatures arrive. Draining irrigation systems is especially important in USDA Hardiness Zones 5 and colder.

November

• Apply a 3–4 inch layer of mulch around perennials and shrub root zones after the ground hardens to moderate soil temperature fluctuations.
• Wrap burlap around marginally hardy broadleaf evergreens such as boxwood and holly in exposed locations to reduce winter burn.
• Clean and oil hand tools before long-term storage. Lightly coat metal surfaces with a thin layer of oil to prevent rust.

Winter (December–February): Plan Ahead

The garden may be dormant, but winter is an ideal time to sharpen skills, evaluate the previous season, and order seeds before popular varieties sell out. Indoor plants also need closer attention as heating systems dry household air significantly. See which indoor plants thrive in drier winter conditions.

December–January

• Review last season's records. Note what germinated well, what struggled, and what pests appeared — this informs next year's rotation and variety choices.
• Order seed catalogs and plan crop rotations. Rotating plant families across beds year to year helps break pest and disease cycles.
• Sharpen and repair tools: hoe blades, pruner blades, and shovel edges all benefit from sharpening before spring.

February

• Start onions and leeks indoors — they need 10–12 weeks before transplant date and are among the earliest indoor starts of the year.
• Prune dormant fruit trees and grapevines in late February before bud swell in most US climates. Remove crossing branches, dead wood, and inward-growing limbs.
• Test soil pH and amend beds with lime (to raise pH) or sulfur (to lower pH) before spring planting. Results take several weeks to take full effect.

Just as gardens benefit from seasonal attention, so does your home's envelope. Once you've finished fall garden tasks, consider weatherproofing your home before temperatures drop to maximize energy efficiency.