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What to Plant in September: A UK Gardener's Guide

What to Plant in September: A UK Gardener's Guide

Ewan Norrie
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September is a second spring for gardeners in the UK, offering the perfect conditions to plant perennials, shrubs, and spring bulbs, setting the stage for a vibrant garden next year.

September, often overlooked as a wind-down month, is actually one of the best times to get planting in the UK garden. The soil is still warm from the summer months, while the cooler air makes for much more pleasant gardening conditions. This combination provides the perfect environment for establishing new plants, setting the stage for a lush, colourful garden come spring.

Spring-Flowering Bulbs

Spring may feel like a distant thought, but planting bulbs now ensures a riot of colour when the days start to lengthen again. Narcissus and allium are classic choices for planting in September. Narcissus, or daffodils, are hardy and reliable, their sunny blooms heralding the start of the new season. Alliums, with their striking globe-shaped flower heads, can add architectural interest to borders. Consider varieties like Allium ambassador 'Bulbs Uk' to create a stunning display.

Allium Ambassador
Allium Ambassador — from £9.99 Compare prices →
Ornamental Onion
Ornamental Onion Compare prices →

Perennials and Shrubs

Autumn is also an ideal time for planting perennials and shrubs. The soil is perfect for encouraging root growth before winter, allowing plants to settle in and establish themselves. Perennials like Geranium Rozanne are perfect for filling gaps in borders and providing long-lasting colour. Shrubs planted now will have a head start next spring, and their roots will be well-established before the summer heat arrives.

Geranium Rozanne
Geranium Rozanne — from £7.20 Compare prices →

Veggie Patch Additions

For those with a vegetable patch, September is an opportunity to plan ahead and plant for next year. Garlic, such as Allium sativum, is planted now for a summer harvest. It’s a simple crop to grow and an essential ingredient in many dishes. Broad beans can also be sown now; they’ll overwinter and provide an early harvest in the spring.

Hardy Greens and Salad Leaves

If you’re keen to keep harvesting fresh produce beyond summer, consider sowing hardy greens and salad leaves. Varieties like winter lettuce, rocket, and spinach can be sown directly into the soil or under cover for a continuous supply of fresh greens throughout the colder months.

Gardening in September offers multiple advantages over spring planting. With less pressure to water and fewer pests to contend with, plants can establish themselves more robustly. Plus, you’ll have more time to focus on other garden tasks in spring, knowing your groundwork is already laid.

As you plan your autumn planting, remember that comparing plant prices can yield significant savings. Check out ComparePlants to find the best deals and make informed choices without breaking the bank.