"laburnum glows in the June afternoon sunlight"

With the Risk of Frost Passing, It’s Time to Sow Outdoors

At last!  Record temperatures last week of May, the risk of frost is finally fading and the soil warming up. After months of planning, preparing beds, and nurturing seedlings indoors, June is the time to sow many crops directly outside where they will grow and thrive naturally. The longer days and warm temperatures,  create ideal germination conditions for a huge range of vegetables, salad crops, herbs, flowers, and biennials.

Direct sowing is one of my favourite gardening activities. There is something incredibly satisfying about placing seeds into freshly prepared soil and watching tiny seedlings emerge just days later. Some plants positively hate being transplanted anyway, especially root crops and speedy annuals that prefer to stay put once they’ve settled in.

With my heavy clay soil, I do need to prep the ground. The showery weather previous weeks made pulling weeds easier. This drier weather I remove any remaining weeds, stones, and debris before raking the surface until it forms a fine, crumbly texture that allows tiny seeds to settle evenly. I water lightly before sowing so the seeds have enough moisture to germinate properly.

Vegetables Ready for Direct Sowing

Root crops are especially suited to direct sowing because transplanting can damage or distort their roots.

Beetroot is a reliable favourite. The seeds are actually clusters, so thin the seedlings once they appear to give the roots room to swell. I also like using the young beet leaves in salads.

Parsnips benefit from being sown directly where they will mature because they produce long taproots that resent disturbance. I have found that fresh seed tends to germinate more reliably, so I usually buy a new packet each year.

Other vegetables to sow directly outdoors at this time include: Carrots, Radishes, Turnips, Spring onions, Florence Fennel, Swedes, Peas, French beans, Runner beans, Broad beans, Courgettes, Pumpkins, Squash, Sweetcorn (early June)

Beans and peas quickly scramble up supports once temperatures rise. Always plant sweetcorn in blocks rather than rows to improve pollination, while courgettes and pumpkins appreciate rich soil and plenty of space to spread. I grow a single courgette plant in a tub and Nick grows his carrots in containers

Hardier brassicas are sown outdoors at this time. Kale, broccoli, cabbage, and Brussels sprouts can all be started in seed beds transplanting them into their final positions later in summer.

Salad Crops for Continuous Harvests

One of the best things about this time of year is being able to harvest fresh salad leaves straight from the garden. Many salad crops germinate rapidly in warming soil, and it’s best to sow little and often for a continuous harvest throughout summer. Lettuce is one of the easiest crops for me to grow from seed outdoors. Loose-leaf varieties are especially productive because I can pick leaves repeatedly while the plant continues growing. I usually sow every couple of weeks to avoid ending up with too much all at once.

Rocket is another favourite because it provides peppery leaves in just a few weeks. Mizuna and mustard greens are also excellent choices for adding colour and flavour to salads.

Other salad crops to sow directly include: Spinach, Chard, Pak choi, Endive, Chicory, Watercress, Lamb’s lettuce, Corn salad, Cucumber

 TOP TIP: Salad crops appreciate regular watering to prevent bitterness and bolting during hot weather.

Herbs to Sow Outdoors Now

Many herbs can also be sown directly into containers, raised beds, or borders once the likelihood of frost has passed. I love growing herbs because they are incredibly useful in the kitchen and work beautifully even in small spaces.

Coriander germinates quickly outdoors and is best sown little and often because it can bolt in hot weather. Dill, fennel, and parsley are all excellent choices for June sowing and are fantastic for attracting pollinators once they flower.

Other herbs to sow directly include: Basil, Chives, Borage, Chamomile, Calendula, Thyme, Summer savoury, Caraway

Borage is one of my favourites because its vivid blue flowers attract bees in huge numbers. Calendula is another wonderfully useful plant, producing cheerful edible flowers while also drawing beneficial insects into the garden.

Mediterranean herbs such as thyme and oregano prefer well-drained soil and plenty of sunshine. I try not to overwater these, especially in heavier soils.

Flowers That Thrive from Direct Sowing

Direct sowing flowers is one of the easiest and most affordable ways to fill beds and borders with colour throughout summer and autumn. Many annual flowers germinate rapidly in warm soil and quickly catch up with plants started indoors.

Cosmos are among the easiest flowers I grow from seed and they produce masses of delicate blooms loved by pollinators. Sunflowers are another favourite, especially for children, because of their rapid growth and impressive height.

Other flowers to sow outdoors now include: Nasturtiums, Calendula, Cornflowers, Nigella, Poppies, Sweet alyssum, Marigolds, Clarkia, Godetia, Love-in-a-mist, Californian poppies, Zinnias

Nasturtiums are especially versatile because both the leaves and flowers are edible. I also find they help attract aphids away from vegetable crops, making them useful companion plants.

I often sow wildflower mixes directly into prepared patches too, creating pollinator-friendly areas buzzing with bees and butterflies throughout summer.

Biennials to Start for Next Year

Late spring and early summer are ideal times to sow biennials outdoors. These plants usually produce foliage in their first year before flowering in the second, making them excellent for planning future displays.

Start biennials in nursery beds (or seed trays) before transplanting them into their flowering positions later in the season. Foxgloves bring height and elegance to cottage gardens, while wallflowers provide wonderful scent and colour in spring borders. Forget-me-nots are perfect for naturalising beneath shrubs and trees, creating soft drifts of blue flowers the following year. Hollyhocks add dramatic height along walls and fences.

Tips for Successful Germination

Even easy-to-grow seeds benefit from a little extra care during germination. I always follow the sowing depths listed on seed packets because burying seeds too deeply can prevent them from sprouting. Fine seeds often only need a very light covering of compost or soil.

I also protect newly sown areas from birds using netting or fleece where necessary, particularly when sowing peas and beans. Slugs and snails can quickly damage tender seedlings, so regular checks are worthwhile.

When watering, I use a fine rose on the watering can to avoid washing seeds away. During hot dry spells, keeping the soil consistently moist is essential for good germination.

Labelling rows clearly also saves confusion later, especially when seedlings are still tiny. It prevents me from accidentally hoeing emerging plants while weeding.

A Season Full of Promise

The garden is shifting into active growth, with every newly sown row carrying the promise of future harvests and displays. Whether I am growing vegetables for the kitchen, herbs for flavour, salad leaves for summer meals, or flowers for pollinators and colour, this is the season to make the most of the warmth and longer days. With regular sowing, careful watering, and a little patience, the garden will soon burst into life. Seed packets can finally be opened, beds filled, and the joy of watching tiny seedlings emerge and flourish outdoors begins.