What to plant in September – a guide to autumnal gardening

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Growing everything from flowers to vegetables in your garden will deliver a varied and colourful display right through the summer, but replacing your pots, borders and beds with hardy annuals for the seasons ahead will keep your garden looking full and vibrant for the rest of the year. Choosing seasonal vegetables and weather-wise shrubs, flowers and herbs for your autumn garden is easily done with this guide of what to plant in September.

The peak growing season may be over but there is still plenty of choice when it comes to choosing autumnal plants to spice up your property as the temperature starts to drop.

Whether you’re looking for vegetables for your winter harvest or are in need of some bold green shrubs to fill out your borders, there are plenty of plants that root well in the autumn and are in their prime time to be planted right now.

For a vibrant spring display…

As the weather gets colder it’s important to look for hardy varieties, especially annual plants which will re-flourish each year to avoid having to replant them.

While the ground is still retaining some warmth from the summer, get in the garden with spring bulbs like tulips and daffodils to secure a gorgeous array of colour when spring arrives.

Plant bulbs deep for well-secured and supported stems, which will be sturdy enough to re-plant the following year.

Choose bright-petalled blooms like calendula for a touch of yellow in your seasonal spring display that will attract plenty of pollinators to your garden.

Calendula should flower in may when seeds are sown in autumn and are a great addition to gardens with vegetable patches as they attract bees and butterflies, while deterring pests with their fragrant scent.

For winter blooms…

Planting ahead of the winter should be on your September to-do list as there are many fast-growing plants that will flourish in a matter of months.

Opt for hardy winter-flowering perennials like pansies which will brighten up garden containers and beds through the harsh winter months.
Pansies come in an array of colours which will bloom in winter and again in Spring.

By planting these small perennials in September, you can give the roots time to establish, increasing their chances of surviving and thriving in the winter weather.

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Vegetables to sow in September

September is a big month for harvest as late-summer fruits and vegetables grow in abundance across many UK gardens.

As your harvest comes to an end, it’s time to start sowing new crops like green winter vegetables which can be used in your hearty-winter comfort cooking.

Leafy green spinach, fragrant garlic and peppery radishes are three of the hardiest winter varieties to focus on this September.

Sow spinach from seed and enjoy their green leaves in just 10 weeks – or as little as six if you are lucky.

Garlic will take around 10 months to grow to full harvest when grown from bulbs so be prepared to wait a while until you can replenish your kitchen stock with the homegrown kind.


Fiery rocket and winter lettuce should be your garden greens of choice this September.

If winter lettuce is sown in September and October you can secure a continual supply of fresh leaves right through to the spring.

Radishes are quick to grow so be sure to sow them little and often to enjoy a prolonged harvest through the autumn and winter.


Coriander can be sown directly in the soil in September so choose a planting spot close to your kitchen for easy access when cooking up your favourite dishes.

Herbs like cilantro (coriander) are ideal for growing in September as they tend not to bolt in the cooler weather.

Trees and shrubs

Choose evergreens for your September gardening for a touch of colour across your garden display.

Everything from hydrangeas to the Japanese maple tree are great options to secure those rich autumnal hues across your garden.

Continus, also known as a smoke bush, is a good choice for a touch of colour given by their soft, smokey pink summer flowers and scarlet tinted leaves.

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