It’s June, your neighbor’s tomatoes are already staked, and you’re just now finding time to dig. Take a deep breath, it’s not too late to start a vegetable garden in June.

I’ve been gardening in Eastern Iowa for years, and June is still one of my favorite planting months. Yes, spring slipped by. But warm soil, long days, and a solid four months of growing season ahead of you mean there’s still a real harvest waiting if you act now. Whether you’re starting from scratch or filling gaps in an existing garden, here’s everything you can plant in June + what to do to set yourself up for success.

Is It Too Late to Start a Garden in June?

No, and I want to say that clearly, because the internet loves to make gardeners feel like they’ve missed the boat.

If you’re in Zone 5 (like I am in Eastern Iowa), your last frost date is around May 15 and your first fall frost typically arrives around October 15. That gives you a four-month growing window. There’s plenty of time to grow beans, squash, cucumbers, tomatoes, peppers, herbs, and more.

If you’re in a warmer zone, Zone 6, 7, or 8, you have even more time and more options. A June garden isn’t something to be ashamed of.

The key is knowing what to plant and moving quickly, especially for crops that need the most days to maturity.

What to Plant in June: Direct-Sow Seeds

These warm-season vegetables love June’s warm soil and can be sown directly in the ground. If you’re in Zone 5, aim for early June rather than late to give crops enough time to mature before fall.

Vegetables to Direct Sow by June 10

• Beans (bush or pole) — fast-maturing and forgiving; 50–60 days to harvest
• Beets — do well in warm soil; harvest in 55–70 days
• Carrots — plant in loose, deep soil; 70–80 days but worth it
• Cucumbers — love the heat; 50–65 days to harvest
• Summer squash and zucchini — incredibly productive; 45–55 days
• Winter squash — needs more time (80–100 days), so plant early June at the latest in Zone 5
• Muskmelon (cantaloupe) — 75–90 days; needs heat and space
• Watermelon — 70–90 days depending on variety; short-season types like ‘Sugar Baby’ are ideal for Zone 5
• Kale — tough, heat-tolerant once established; 50–65 days

Flowers to Direct Sow in June

• Zinnias — bloom fast (60–70 days), attract pollinators, and thrive in summer heat
• Sunflowers — sow through early June for mid-to-late summer blooms

What to Plant in a June Garden

If you’re not in Zone 5, the timing of this list might be off a bit, but in general, the progression is the same. Make sure you know your last average frost date and first average frost date. Those two dates determine when to do what in your specific area.

In my area of Eastern Iowa, the last average frost date is May 15 and first average frost date is October 15. If you plant in June, you still have a 4-month growing season.

Other Plants for a June Garden

Tomatoes and Peppers

Most varieties of tomatoes and peppers need to be in the ground by early June so they have enough time to ripen before fall frost. If you’re working with transplants rather than seeds, you still have a real shot — look for healthy starts with good root systems.

I always follow these tips for planting tomato seedlings to give transplants the best start.

Sweet Potato Slips

June is actually the ideal time to plant sweet potato slips — they want warm soil, and June delivers exactly that. These are one of my favorite June plants because they’re low-maintenance once established.

Potatoes

Potatoes can be planted as late as June 5. If you haven’t tried the no-dig method for growing potatoes, June is a great time to give it a shot — it makes both planting and harvest significantly easier.

Pumpkins

The end of June is actually the perfect time to plant pumpkins for Halloween. Starting pumpkin seeds between mid-June and early July gives them just enough time to mature by fall. My kids and I always start our pumpkin patch around the summer solstice.

Herbs

Plant herbs through June — either from seed or transplants. Basil, dill, cilantro, parsley, chives, and oregano all do well. Herbs also make excellent companion plants that help deter pests throughout your garden.

Celery, Endive, Swiss Chard, and Leeks

All of these can be planted through June. Swiss chard in particular is one of my favorite summer workhorses — it handles heat better than many greens and keeps producing for months.

Broccoli, Cabbage, and Cauliflower Transplants

These cool-season crops can go in during early June, but they struggle in intense heat. Get them in the ground as early as possible, water consistently, and be prepared for slower growth if temperatures spike. If they bolt (go to seed) before forming heads, chalk it up to experience and try to plant them earlier next year.

Peas

Peas can technically be planted through June, but like brassicas, they prefer cool weather. In Zone 5, a late June pea planting is a bit of a gamble. If you try it, choose a fast-maturing variety and keep them well-watered.

Rhubarb

Rhubarb can be planted as late as June, but new plants need consistent watering and weeding to get established. Don’t harvest from new rhubarb plants the first season — let them put their energy into root development.

Start Seeds Indoors in June: Plan for Fall Now

Here’s a June secret that most gardeners overlook: June is when you start thinking about fall.

Once your warm-season crops are in the ground, it’s time to start cool-season seeds indoors for a fall harvest. Cabbage, broccoli, and other brassicas started indoors in June will be ready to transplant outdoors in July, giving you a second round of harvests before frost.

Fall gardening can extend your season significantly if you remember to start a tray of seeds in June.

June Planting by Zone: Quick Reference

Zone	Last Frost	First Frost	June Notes
Zone 4	May 15–June 1	Sept 15–Oct 1	Plant fast-maturing varieties; prioritize direct sow immediately
Zone 5	May 1–May 15	Oct 1–Oct 15	Strong June planting window; most crops viable
Zone 6	Apr 15–May 1	Oct 15–Nov 1	Extended planting window through mid-June
Zone 7	Mar 15–Apr 15	Nov 1–Dec 1	Can plant most crops through late June; consider heat-tolerant varieties
Zone 8	Feb 15–Mar 15	Nov 15–Dec 15	Summer heat is the main constraint; focus on heat-lovers

Find your exact frost dates at Dave’s Garden Freeze/Frost Dates.

What NOT to Plant in June

Knowing what not to plant saves you time, money, and frustration.

• Asparagus from seed — asparagus takes 2–3 years to establish from seed. If you want to add it to your garden, use crowns and plant in early spring.
• Lettuce and spinach — these bolt (go to seed and turn bitter) quickly in summer heat. Wait until late July or August to start fall greens.
• Onions and leeks from seed — too late for a full-season harvest from seed. Use sets or transplants instead.
• Garlic — garlic is a fall crop; plant it in October for harvest the following summer.

Frequently Asked Questions About What to Plant in June

Once you’ve got everything in the ground, June gardening doesn’t stop there. From mulching and pest scouting to harvesting strawberries and starting fall brassicas indoors, there’s a whole checklist of tasks that will keep your garden thriving all summer. Get the full breakdown in my June Garden Checklist.

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