What to Plant in July in Pennsylvania

Most PA gardeners look at July and think the planting season is over. The tomatoes are in, the squash is growing, and the garden just needs maintenance until fall. That’s partially true — but it’s also how you end up with no broccoli, no cauliflower, and no fall garden in October.

July has a short but real window for direct-sown warm-season crops, and it has one task that’s more important than anything else you’ll do all month: starting fall brassica transplants indoors. Miss that July window and you’ll be hunting for overpriced garden center transplants in August.

How Much Growing Season Is Left (July 1)

Before deciding what to plant, know your runway. Here’s how many days remain between July 1 and average first fall frost for each PA zone:

Zone 5a gardeners have fewer than 90 days. That rules out anything with a long maturity unless it handles frost and can extend past the first light freeze. Zone 7a still has nearly five months — enough for a July bean succession and a strong fall garden.

What to Direct Sow Outdoors in July

The list of crops that can be successfully direct sown in July is shorter than June, but it’s not empty. The cutoff for each crop depends on days-to-maturity and your first frost date.

Bush Beans — The Best July Direct-Sow Crop

Bush beans mature in 50–60 days, which means a July 1 planting produces harvest in late August and September — perfect cool-weather conditions for beans. A July 15 planting still works for zones 6a–7a.

The benefit of a late planting: bean beetles and diseases tend to be less severe in the cooler late-summer weather. July beans that mature in September are often the cleanest of the season.

Beets (Early July)

Beets mature in 50–65 days and tolerate frost — they actually develop more sweetness after cold nights. A July 1–10 planting produces fall harvest in mid-September through October across most of PA. In zone 7a, beets can be planted anytime in July for an October–November harvest.

Sow ½ inch deep, 1 inch apart. Each beet “seed” is a cluster — thin to 3 inches apart once seedlings are 2 inches tall. The thinnings are edible; use as micro-greens or sauté the greens like chard.

Dill and Cucumbers

Dill can be succession sown all through July. It germinates quickly in warm soil and even provides harvestable fronds before seeds fully develop. A July planting blooms in late September, attracting beneficial insects during fall vegetable harvest.

Cucumbers (50–65 days) are the first week of July only, and only for zones 6b–7a where first frost arrives in mid-to-late October or November. Choose a fast-maturing variety: Straight Eight (55 days), Spacemaster (55 days), or Marketmore 76 (58 days). Zone 5a–6a: skip it.

The Most Important July Task: Start Fall Transplants Indoors

This is the section most people skip — which is why most PA gardeners don’t have broccoli in October. If you want fall brassicas, July is when you start them. No other timing works.

Broccoli, Cauliflower, and Cabbage

Here’s the math: broccoli and cauliflower need 60–80 days from transplant to harvest. They need to be transplanted outdoors in mid-to-late August, when temperatures start cooling. That means starting seeds indoors in early-to-mid July — 4–6 weeks before August transplant.

July 5–15 indoor sowing → August 15–25 transplant → October 15–November 1 harvest. That’s the sequence. Do it and you’ll have fresh broccoli when the rest of the neighborhood’s garden is spent.

Sow seeds ¼ inch deep in cell trays under grow lights. Keep medium consistently moist but not soggy. According to University of Maryland Extension, late July to mid-August transplant timing is ideal for fall brassicas in the mid-Atlantic region — starting indoors in July is exactly right. Transplant outside when seedlings have 4–5 true leaves and are 4–6 inches tall.

Brussels Sprouts — Last Chance for Zones 6a–7a

Brussels sprouts need 90–120 days from transplant. If you didn’t start them in June, early July is your absolute last chance for zones 6a–7a. Zone 5a–5b gardeners: not practical without season extension.

Start seeds indoors immediately in early July. Transplant outside in early August. Brussels sprouts improve significantly with frost — cold stress converts starches to sugars, making post-freeze sprouts noticeably sweeter. Plan for October–November harvest.

Order Seed Garlic This Month

You won’t plant garlic until mid-October through November — but July and August are when you need to order it. Good seed garlic sells out fast. The best hardneck varieties — Music, German Extra Hardy, Chesnok Red, Purple Stripe types — are often gone by September.

Look for hardneck garlic for PA’s climate. Softneck types (braiding garlic) don’t perform as well through our cold winters. The SARE (Sustainable Agriculture Research & Education) garlic production guide is a good reference for hardneck variety selection by climate zone.

Store seed garlic in a cool (50–65°F), dark, well-ventilated spot until planting time. Not the refrigerator — humidity causes rot. A paper bag in a cool basement works perfectly.

What NOT to Plant in July

• Tomatoes — a tomato transplanted in July won’t produce ripe fruit before frost in any PA zone. The plant might survive and flower, but fruit won’t mature. Focus on maintaining existing plants.
• Peppers — same problem, and peppers are even more temperature-sensitive. July pepper planting is a waste of a transplant.
• Corn — needs 60–100 days of warm weather plus block pollination. Too late for any zone except possibly 7a, and even there it’s risky.
• Melons — most need 75–90 days and must ripen in warm weather. A July planting puts harvest when cool nights arrive — melons won’t sweeten properly in cooling temperatures.
• Cool-season crops (lettuce, spinach, peas) — July heat causes immediate bolting or germination failure. Wait until late August for fall cool-season plantings.

July Lawn Care

July is a defensive lawn month. Cool-season grasses are under maximum stress. The goal is to keep them alive — not push growth.

Mow at 3.5–4 inches minimum all summer. This is the single highest-impact lawn care decision you make in July and August. Taller grass shades its own root zone, reducing soil temperature by 10°F or more. If your lawn care company is cutting below 3 inches in July, they’re hurting your lawn.

Cool-season grasses have two healthy responses to summer heat: stay green with 1–1.5 inches of water per week, or go dormant and turn brown. Both are fine. What’s damaging is inconsistency — watering just enough to keep the grass partially green and stressed, then stopping during vacation. Commit to one approach or the other.

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Managing Your Summer Garden in July

Consistent Watering Is Critical

Tomatoes especially need consistent, deep watering — inconsistent moisture (dry then soaked) causes blossom end rot and fruit cracking, two of the most frustrating summer problems. Aim for 1–2 inches per week, delivered slowly and deeply. A soaker hose on a timer is worth every penny.

Tomato Blossom Drop — Normal, Not a Disease

When daytime temps stay above 90°F and nights above 75°F, tomatoes drop blossoms without setting fruit. This is a temperature response, not a disease. Once night temps drop below 75°F in late July or August, fruit set resumes. Keep plants watered and healthy, and don’t panic.

July Pest Peak: Japanese Beetles and Squash Vine Borers

Japanese beetles peak in late June through July. Hand-pick into soapy water early in the morning when they’re sluggish. Research from University of Kentucky Entomology shows that pheromone traps attract more beetles to your yard than they catch — avoid them.

Squash vine borers lay eggs at the base of squash plants in June–July. If a healthy squash plant suddenly wilts on a hot afternoon, check the stem base for a small entry hole and sawdust-like frass. You can sometimes save affected plants by slitting the stem, removing the larva, and mounding moist soil over the wound to encourage re-rooting. Your mid-June backup squash planting (if you made one) will come in right when the first planting declines.

July Planting Calendar at a Glance

Season planning: Check our month-by-month Pennsylvania planting guide to keep your garden producing all year. Browse all Pennsylvania vegetable guides.

Frequently Asked Questions About Planting in July in Pennsylvania