8 Best Vegetables to Grow in June

8 Best Vegetables to Grow in June Discover the top vegetables to plant in your garden this June for a bountiful harvest. Read our guide now for expert gardening advice from WM James & Co.

With spring quickly turning into summer, June is a great time to start planting vegetables for a late summer and autumn harvest!

From succulent leafy greens that thrive in the mild weather to robust root crops ready to flourish beneath the soil, here's a curated selection of 8 of the finest vegetables that you can start growing in June to make the most of your garden.

In this guide, we'll look at:

  1. Swiss Chard
  2. Beets
  3. Radish
  4. Summer Squash
  5. Okra
  6. Corn
  7. Spring Onions
  8. Tomatoes


8 Easiest Garden Vegetables to Plant in June

There are many types of vegetables that you can plant in June in the UK.

To keep things simple, we've picked 8 of the easiest vegetables to plant in your vegetable plot to yield delicious vegetables in the late summer and into autumn.

Vegetables to Grow in June When to Harvest
Swiss Chard 10-12 weeks after sowing until the end of October
Beets Early summer through to mid-autumn, when roots are golf ball size
Radish From 4 weeks after sowing
Summer Squash Mid-summer onwards. Pick when fruits are small and soft to encourage further fruiting
Okra 5-6 days after flowering, when pods are 2-4 inches long
Corn August-September, when tassels turn brown
Spring Onions 8 weeks after sowing, roughly 6 inches tall
Tomatoes When ⅔ of the fruit is fully coloured


1. Swiss Chard

Swiss chard is ideally planted between April and July in the UK, allowing it to thrive during the warmer months.

For the best results, choose a sunny or partially shaded spot in well-drained soil. Enrich the soil with plenty of organic matter before planting.

Sow the seeds directly into the ground, spacing them about 30 cm apart to give each plant room to grow. Our Burgon & Ball Plant Spacing Ruler is the perfect tool to have on hand for planting. It has nifty little prompts to help you space your plants evenly.

Regular watering, especially during dry spells, and a monthly feed with a general-purpose fertiliser will help to ensure the healthy growth of your Swiss Chard.

Top Tip: Remember to harvest the leaves from the outside, allowing the plant to continue producing new leaves for a continuous supply.


Swiss Chard

2. Beets

Beets are a versatile and nutritious root vegetable that can be planted from March to July, with June offering ideal conditions for sowing.

To achieve the best results, select a spot in your garden that receives full sun to partial shade, as beets are not overly picky about their growing conditions but require at least four hours of sunlight a day.

Prepare the soil by loosening it to a depth of at least 25 cm and mixing in a generous amount of well-rotted compost or manure to provide nutrients.

Beet seeds should be sown directly into the soil, approximately 2 cm deep and 10 cm apart, in rows that are spaced 30 cm apart. This spacing allows each beet to grow to its full size without competition for nutrients or water.

Water thoroughly after sowing and keep the soil evenly moist, especially during dry periods, to encourage steady root growth.

Top Tip: For a continual harvest, practice succession planting by sowing new seeds every 2 to 3 weeks throughout the planting window.



3. Radish

Radishes are an ideal choice for June planting due to their speedy growth and the minimal space they require. These peppery vegetables can be harvested as quickly as four weeks after planting, making them a rewarding addition to any summer garden.

For optimal growth, radishes prefer well-drained soil and a position that receives full sunlight, though they can tolerate partial shade. Prior to sowing, ensure the soil is loose and free of stones to allow for unimpeded root growth.

Sow seeds directly into the soil, spacing them around 1 cm deep and 5 cm apart in rows that are 15 cm apart.

Regular watering is crucial to prevent the soil from drying out, as this can lead to woody radishes – so a trusty watering can will be needed!


4. Summer Squash

June is an excellent time to plant summer squash in the UK as it aligns perfectly with the start of the warm weather, which is crucial for the germination and growth of this heat-loving crop.

Planting in June allows them enough time to develop before the peak summer harvest.

For the best start, choose a sunny spot in your garden where your squash will receive at least 6 hours of direct sunlight daily.

Summer squash thrives in well-drained, fertile soil, so enrich your planting area with a good quantity of compost or well-rotted manure before planting.

Position them about 2 cm deep. Space the plants approximately 90 cm apart to allow ample room for growth. Mulching around the plants can help retain soil moisture and control weeds.

Summer Squash

5. Okra

Okra, also known as "ladies' fingers", thrives in warm weather, making June an ideal time to plant it.

By sowing in June, you're setting the stage for a harvest that can extend into the early autumn, maximising your yield from these productive plants.

For the best results, choose a sunny site with well-drained soil. Okra prefers rich soil, so it's beneficial to work in a generous amount of compost or well-rotted manure before planting.

Sow seeds 2 cm deep, spacing them around 45 cm apart to give each plant room to grow. Water the plants regularly, but be careful not to overwater, as okra doesn't do well in soggy soil.

The Best Soil For Growing Vegetables Sustainably


6. Corn

June is the optimal time to plant corn in the UK as it coincides with the warmer temperatures crucial for germinating corn seeds.

This period also ensures that corn has enough time to mature and be harvested before the onset of autumn, capitalising on the long summer days that promote photosynthesis and growth.

To maximise the yield of your corn plants, it's essential to prepare the soil by adding a generous amount of organic compost to ensure it’s fertile and well-drained. Corn is a heavy feeder, so the soil needs to be rich in nutrients.

Plant the seeds about 2.5 cm deep in soil warmed to at least 10°C, spacing them 20-30 cm apart in rows 75-90 cm apart. This spacing allows the plants to pollinate more effectively, as corn relies on wind to transfer pollen from the tassels to the silks.

Top Tip: Planting corn in blocks rather than single rows improves pollination due to the increased proximity of plants, leading to fuller ears and a more bountiful harvest.



7. Spring Onions

Spring onions, with their crisp texture and sharp flavour, are a fantastic addition to the June planting calendar.

Planting them in June provides the perfect balance of mild weather, ensuring that the young onions can establish themselves without the risk of being damaged by the last frosts of spring or the intense heat of mid-summer.

For the best results, select a site that receives plenty of sunlight, although spring onions will tolerate partial shade. They prefer well-drained, fertile soil, so it's beneficial to incorporate some compost or well-rotted manure into the planting area before sowing.

Sow the seeds around 2-3 cm apart to provide enough room for the onions to develop without overcrowding.

Keeping the soil moist but not waterlogged is key to their growth, so water regularly, especially during dry spells.

Spring Onions

8. Tomatoes

Planting tomatoes in June is highly beneficial for several reasons. Firstly, the risk of frost, which can severely damage or kill tomato plants, is significantly reduced or eliminated.

If you’re concerned about lingering frosts, investing in a Tomato Crop Booster Frame & Cover can provide the protection your plants need from late frosts.

The warm soil and air temperatures of early summer are ideal for the germination and growth of tomato plants, helping them to establish a strong root system quickly.

For the best results, choose a location in your garden that receives at least six to eight hours of direct sunlight daily.

Tomatoes thrive in rich, well-draining soil, so it's advisable to incorporate plenty of organic matter, such as compost or well-rotted manure, into your planting area before sowing or planting.

Space your tomato plants around 45-60 cm apart to allow for ample airflow, which helps minimise the risk of fungal diseases. Support them with stakes or cages to encourage upward growth and to keep fruit off the ground, reducing the risk of pest attacks and diseases.

Protect your blossoming tomato plants from pests with Agralan Whitefly Killer Liquid Spray Concentrate and Garden Bird Netting.


Tips for Preparing Your Vegetable Patch

Of course, to get the best results, you need to make sure the ground you’re sowing your seeds in is prepared properly.

Different plants require different soil preparation in order to thrive, but here are our general top tips for making sure your vegetable patch is ready for your June planting.

Nourish the Ground

Nourishing your vegetable patch's soil is crucial as it directly impacts plant health and yield. Rich, fertile soil supplies essential nutrients that vegetables need to grow robustly.

Without adequate nourishment, plants struggle to mature, leading to poor harvests. So enriching the soil ensures your vegetables can thrive, providing a bountiful and nutritious crop.

Seeds vs Cuttings

Seeds represent the starting point for many plants, requiring germination in the soil to grow, which can be a longer process. Cuttings or seedlings, on the other hand, are portions of mature plants or young plants that have already started growing.

The option that works best for you will likely depend on the quality of your soil and the location of your vegetable patch.

Plan Your Space Properly

Planning your vegetable patch layout is key to optimising growth and yield. Including vertical growers like climbing beans maximises space, providing more area for ground-level planting.

Proper seed spacing prevents overcrowding, ensuring each plant receives adequate sunlight, water, and nutrients.

This strategic allocation of space and resources fosters a healthier, more productive garden.

Make Use of a Fruit Cage

Fruit cages are the ideal way to protect your plants from birds and other pests while also allowing them to thrive. With a sturdy frame covered with a fine mesh, fruit cages prevent damage while still providing ample airflow for your plants.

If you’re growing climbers or want to cover a large area, such as an allotment or large vegetable patch, our walk-in fruit cages are the perfect option. These cages allow you to access your plants without removing the frame, thanks to their built-in door.

For smaller plots or garden vegetable patches, our low vegetable cages provide adequate protection and can easily be removed from the patch when you need to tend to your crops.

fruit cage

Summary: Growing Vegetables in June

June presents an ideal opportunity to enrich your garden with a variety of vegetables, ready for a late summer to autumn bounty.

With the right selections and care, these plants can offer not just nourishment but also the joy of knowing where your vegetables have come from.

Explore more of our month-by-month planting blog series for insights and tips on making every month a gardening success!


Is It Too Late to Plant Things in June?

Absolutely not! June is an opportune time to plant a variety of vegetables that can yield a productive late summer and autumn harvest. It's especially ideal for fast-growing crops and those that thrive in warm conditions, ensuring a bountiful and diverse garden even if started mid-year.

Can Fruit Trees be Planted in June?

Yes, fruit trees can be planted in June, especially if they're potted specimens which are not as sensitive to the timing of planting.

However, it's crucial to ensure they are well-watered throughout the summer to establish a strong root system before the colder months.

What Veg is in Season in June UK?

In June in the UK, a variety of vegetables are at their prime, including broad beans, peas, early potatoes, lettuce, radishes, rocket, spinach, spring onions, and early carrots.

This period marks the start of the abundant harvest season, offering fresh and flavourful options for kitchen gardeners and those wanting to enjoy seasonal produce.

Can I Plant Potatoes in June?

While traditionally, potatoes are planted earlier in the year, it is possible to plant certain late-season varieties in June. These will be ready for harvest in the autumn.

However, it's important to ensure that they are watered regularly and protected from the first frosts to maximise your harvest.