September marks the beginning of autumn, bringing cooler temperatures and shorter days. It's a time of transition in the garden, where the focus shifts from the vibrant blooms of summer to preparing for the colder months ahead.
This month is perfect for tidying up, harvesting the last of summer's bounty, and planning for a beautiful spring display.
Here’s a guide to the essential gardening tasks for September:
1. Harvesting Late Crops
September is a busy time for harvesting the last of summer vegetables and fruits. Continue picking regularly to encourage any remaining fruits to ripen. Harvestable crops this month include:
Vegetables: Tomatoes, peppers, beans, courgettes.
Fruits: Apples, pears, plums.
Make sure to store fruits in a cool, dry place, and consider making jams or preserves with any excess to enjoy them throughout the colder months.
2. Planting Spring Bulbs
Now is the time to plant spring-flowering bulbs such as daffodils, tulips, crocuses, and hyacinths. Plant them at the right depth (usually two to three times the height of the bulb) and in well-draining soil. By planting bulbs now, you'll ensure a beautiful and vibrant display when spring arrives.
3. Divide Perennials
September is an excellent month to divide overcrowded perennials like asters, hostas, and daylilies. Dividing these plants helps rejuvenate them, encourages healthier growth, and increases your plant stock. Make sure to water well after replanting to help them establish before winter.
4. Lawn Care
September is a key month for lawn maintenance. Scarify (rake) the lawn to remove moss and thatch, aerate it to improve drainage, and apply an autumn lawn feed high in potassium to strengthen roots. If your lawn has bare patches, this is also a good time to reseed or lay new turf.
5. Composting
Clear away any spent annuals, fallen leaves, and plant debris to add to your compost heap. September is a great time to turn over compost heaps to aerate them and ensure even decomposition. Make sure to balance green materials (like grass clippings) with brown materials (like dried leaves) for a healthy compost mix.
6. Pest and Disease Control
As summer ends, pests like slugs, snails, and vine weevils can become problematic. Use eco-friendly methods such as beer traps for slugs, or encourage natural predators like birds and hedgehogs to keep pest numbers down. Remove any diseased plant material to prevent diseases from spreading and overwintering in your garden.
7. Sowing for Winter and Next Spring
You can still sow hardy vegetables such as spinach, winter lettuce, and spring onions in September. These crops can provide fresh produce over the winter months. Additionally, consider sowing green manures like clover or mustard to cover bare soil, suppress weeds, and improve soil fertility for next spring.
Our Top Tips for September
Save Seeds for Next Year:
As you clear out summer plants, consider saving seeds from your best-performing flowers and vegetables. Choose seeds from healthy, robust plants, and make sure they are fully ripe before collecting. Dry them thoroughly and store them in labelled envelopes in a cool, dry place. Seed saving is a cost-effective way to prepare for next year’s garden and helps preserve plant varieties that thrive in your local conditions. This sustainable practice also ensures a more personal and rewarding gardening experience next season!
Prepare Your Garden for Winter Wildlife:
As you tidy up your garden, think about how you can support local wildlife through the colder months. Leave some seed heads on plants like echinacea and sunflowers for birds to feed on, create a leaf pile or log heap as a shelter for hedgehogs, and consider putting up bird feeders. Providing food, water, and shelter can make a big difference for garden wildlife as winter approaches.
By focusing on these essential gardening tasks, you’ll keep your garden looking its best and prepare it for the colder months ahead.
September is a perfect time to plan and plant for the future, ensuring a healthy, productive garden next spring. Make the most of this transitional month to tidy up, harvest, and lay the groundwork for the seasons to come.