Summer Gardening Guide
Keep your garden thriving through the hottest months
Summer at a Glance
Month-by-Month Summer Tasks
June
- Finish transplanting warm-season crops
- Apply 3-4 inches of mulch around plants
- Set up drip irrigation if not already done
- Begin regular pest scouting routine
- Harvest spring crops before they bolt
July
- Water deeply and consistently (1-2" per week)
- Harvest daily - don't let produce over-ripen
- Side-dress heavy feeders with compost or fertilizer
- Manage pest populations before they explode
- Plant succession lettuce in shade
August
- Start fall crop seeds indoors (broccoli, cabbage)
- Direct sow fall carrots, beets, turnips
- Peak harvest time - preserve excess produce
- Monitor for late blight on tomatoes in humid areas
- Order garlic for fall planting
Watering Strategies
The Fundamentals
How Much
- • Most vegetables need 1-2 inches/week
- • Containers may need daily watering
- • Sandy soil needs more; clay needs less
- • Use a rain gauge to track actual water
How Often
- • Deep water 2-3x per week, not daily
- • Morning watering is best
- • Drip irrigation is most efficient
- • Check soil moisture 2" deep before watering
Signs of Underwatering
- • Wilting in afternoon heat
- • Dry soil 2" below surface
- • Slow growth, small fruit
- • Leaves curl or turn crispy
Signs of Overwatering
- • Yellow leaves
- • Root rot (mushy roots)
- • Fungal diseases
- • Constantly soggy soil
Water-Saving Tips
- • Thick mulch layer (3-4")
- • Water at soil level, not leaves
- • Water in morning or evening
- • Use drip or soaker hoses
Common Summer Pests
Tomato Hornworm
Large green caterpillars that can defoliate tomatoes overnight. Look for dark droppings and stripped leaves.
Control: Handpick (check undersides of leaves), BT spray, encourage parasitic wasps
Squash Vine Borer
Larvae bore into squash stems, causing sudden wilting. Look for sawdust-like frass at stem base.
Control: Wrap stem bases with foil, inject BT into affected stems, succession plant
Aphids
Small soft-bodied insects cluster on new growth, causing curled leaves and sticky honeydew.
Control: Strong water spray, neem oil, encourage ladybugs and lacewings
Japanese Beetles
Metallic green/bronze beetles that skeletonize leaves, especially on beans and basil.
Control: Handpick into soapy water, row covers, neem oil (don't use beetle traps - they attract more)
Harvesting at Peak Ripeness
Harvest at the right time for best flavor and to encourage continued production.
Continuous Harvest Crops
- • Zucchini - Pick at 6-8", check daily
- • Cucumbers - Harvest when firm and dark
- • Beans - Pick before seeds bulge
- • Peppers - Green is fine; color = sweeter
- • Tomatoes - Firm and fully colored
One-Time Harvest Crops
- • Onions - When tops fall over and dry
- • Garlic - Lower leaves brown, top green
- • Potatoes - After vines die back
- • Melons - Slip easily from vine, smell sweet
- • Winter squash - Hard skin, dry stems
Beat the Heat
Help your garden survive heat waves:
- • Mulch heavily - 4+ inches keeps roots cool and moist
- • Water deeply - Early morning, directly at soil level
- • Provide shade - Shade cloth (30-50%) protects from scorching
- • Don't fertilize - Stressed plants can't use it; wait for cooler weather
- • Accept some wilt - Afternoon wilt is normal if plants recover by morning
Preparing for Fall
Start Fall Seeds (August)
- • Broccoli and cabbage transplants
- • Kale and collard greens
- • Brussels sprouts (need long season)
- • Direct sow: carrots, beets, turnips
Plan Ahead
- • Order garlic for October planting
- • Plan cover crop areas
- • Note what worked and what didn't
- • Start preserving harvests (canning, freezing)
Frequently Asked Questions
How often should I water my vegetable garden in summer?
Most vegetables need 1-2 inches of water per week. Water deeply 2-3 times per week rather than shallow daily watering - this encourages deep root growth. Sandy soils need more frequent watering; clay soils retain moisture longer.
When is the best time to water the garden?
Early morning is best - plants are hydrated before daytime heat, and foliage dries quickly to prevent disease. Evening is second choice. Avoid midday watering when evaporation is highest and water droplets can magnify sun damage.
How do I keep pests under control organically?
Scout daily for early detection. Use row covers for physical barriers. Handpick large pests. Encourage beneficial insects with flower borders. Use targeted organic sprays (neem oil, BT, spinosad) only when necessary. Healthy plants resist pests better.
Why are my tomatoes not ripening?
Tomatoes stop ripening when temperatures stay above 85-90F - the lycopene development that causes red color stops. Fruits will ripen when temps drop, or harvest when pink and ripen indoors. This is normal in hot summers.