What to Plant in May in Oxfordshire Gardens

May is one of the most rewarding months in the garden. By now, spring feels properly established, gardens are filling out quickly, and there is a real sense of momentum in the air. Borders are greener, trees and shrubs are fuller, and gardeners finally have more freedom to plant confidently for the season ahead.

In Oxfordshire, May is often when outdoor spaces begin to shift from spring freshness into early summer promise. It is the month for planting with optimism, refreshing tired areas, and making decisions that will shape the garden for the months ahead. While it is still wise to keep an eye on late frosts, May is a key moment for flowers, herbs, vegetables, containers and long-term planting. In UK gardens, May is a particularly active month for both ornamental planting and grow-your-own crops.

Whether you are working with cottage borders, raised beds, patio pots or a family garden that needs brightening up, there is plenty to plant this month.                  

Why May is such an important planting month

May offers many of the conditions gardeners have been waiting for. The days are longer, the soil is warmer, and plants usually establish more quickly than they did earlier in spring. This makes it one of the most productive and satisfying months in the gardening calendar.

Warmer soil and faster growth

One of the biggest advantages of planting in May is that the ground has usually warmed up enough to encourage stronger root development. Plants settle in more easily, and seeds germinate more readily than they often do in March or April.

A bridge between spring and summer

May sits in a useful position between the freshness of spring and the fullness of summer. It is a good time to enjoy what is already happening in the garden while planning ahead for the next phase of colour and growth.

Ideal for both ornamental and edible planting

This is a month that suits almost every kind of gardener. If you love flowers, there is plenty to choose from. If you enjoy growing your own, May is one of the best months to get productive crops underway outdoors.

Flowers to plant in May

If you want your garden to look fuller, brighter and more colourful in the weeks ahead, May is a wonderful time to plant flowers.

Summer bedding plants

By May, many gardeners start thinking more confidently about summer bedding. Towards the end of the month, once the risk of frost has eased, summer bedding can begin to play a bigger role in containers and borders.

Popular choices include:

• petunias
• geraniums
• lobelia
• bacopa
• begonias

These are excellent for giving patios, front doors and garden edges a more vibrant seasonal feel.

Hardy perennials

Perennials are one of the best long-term additions you can make to a garden in May. They build structure, return year after year and often support pollinators as well.

Good May choices include:

• salvia
• hardy geraniums
• echinacea
• nepeta
• verbena bonariensis

These work particularly well in mixed borders and can help create a garden that feels both colourful and established.

Sweet peas and climbers

May is a lovely time to enjoy sweet peas as they start putting on stronger growth. Climbers can also be added to arches, walls and obelisks to bring height and softness into the garden.

Shrubs to plant in May

Shrubs are a useful way to add shape, structure and long-term value to your garden.

Lavender

Lavender is ideal for sunny Oxfordshire gardens and is a wonderful choice for paths, borders and containers. It brings scent, structure and pollinator appeal all in one plant.

Hebe

Compact and neat, hebes work especially well in smaller gardens and front garden planting. Many are evergreen, so they continue to give shape beyond the flowering season.

Hydrangeas

Hydrangeas are a popular garden favourite and can perform beautifully in the right spot. If your garden has a more sheltered position or slightly heavier soil, they can become a striking feature later in the season.

Herbs to plant in May

May is one of the best months to build or refresh an herb garden.

Basil

Basil is more tender than many other herbs, so May is a more comfortable time to begin planting it outside in sheltered spots or in containers that can be protected if temperatures drop unexpectedly.

Rosemary

Rosemary is a useful herb for both kitchen gardens and ornamental displays. It works well in pots, gravel gardens and sunny borders.

Thyme and oregano

These Mediterranean herbs are perfect for well-drained, sunny positions and work beautifully in herb beds or decorative patio containers.

Chives and parsley

Both are practical, easy to grow and useful for everyday cooking. They also add freshness and texture to kitchen garden planting.

Vegetables to plant in May

For anyone growing their own food, May is one of the busiest and most exciting months of the year.

Beans and peas

French beans and runner beans are classic May crops and can be sown outdoors when conditions are suitable. Peas also remain a rewarding choice for many home growers. RHS May advice highlights beans as one of the key outdoor sowing tasks this month.

Lettuce and salad leaves

Lettuce and salad leaves are still a great option in May, either in beds, raised planters or containers. If the weather remains unsettled, some protection may still help young plants establish more reliably.

Squash, courgettes and pumpkins

These are all popular choices for late spring sowing. They need warmth and space, but May is the month when many gardeners begin growing them more seriously.

Sweetcorn

Sweetcorn is another useful crop to start in May. It grows best when planted in blocks rather than rows, which improves pollination later on.

Potatoes

If any potatoes remain to be planted, May is still an important time to get them in and to earth up existing growth as it develops.

What to plant in containers in May

Containers are one of the easiest and most effective ways to bring the garden to life in May.

Summer-ready patio pots

As the month progresses, patios and entrances can be refreshed with more colourful seasonal planting. A mix of flowers, foliage and herbs works particularly well.

Pots for scent and pollinators

Lavender, thyme, rosemary and flowering perennials are excellent in containers and provide both beauty and benefit to pollinators.

Flexible planting for smaller gardens

For smaller Oxfordshire gardens, containers remain one of the best ways to add instant seasonal interest without needing large borders.

Things to keep in mind when planting in May

May is generous, but it still pays to garden with a little care.

Watch for late frosts

Late frosts are still worth keeping in mind, particularly in exposed gardens or with more tender plants. Protecting vulnerable plants remains part of standard May garden care in the UK.

Water new plants properly

May can bring warm, drying days as well as rain, so newly planted areas should be watered consistently while they establish.

Support fast-growing plants early

Climbers, peas, beans and taller perennials all benefit from support before they get too large.

Make the most of May in your garden

May is one of those months when the garden seems to change almost daily. Planting now can bring rewards in just a few weeks, whether that means flower-filled containers, productive vegetable beds or borders that begin to feel lush and full.

If you are wondering what to plant in May in Oxfordshire gardens, the answer is simple: this is the month to be ambitious, while still being practical. Choose plants that suit your garden’s light, soil and space, and use May as the moment to shape the season ahead.

At Bampton Garden Plants, May is one of our favourite times of year. If you are planning your garden this month, visit us for inspiration, seasonal plant choices and ideas to help your Oxfordshire garden thrive.