Your August Planting Guide
August marks a significant shift in the gardening calendar, presenting a unique opportunity to sow seeds that will mature in the cooler, shorter days ahead. While summer crops are winding down, this period is ideal for planting varieties that can withstand or even benefit from autumn conditions, ensuring a continuous supply of fresh produce. Many vegetables and salad crops are perfect candidates for sowing now, offering a satisfying harvest when many other gardens are bare.
- Sow hardy greens for autumn and winter yields.
- Consider root vegetables that mature quickly.
- Plan for succession planting of certain salad crops.
- Protect young seedlings from potential early frosts.
The key to successful August sowing lies in choosing the right varieties – those with shorter maturity times or a natural tolerance for cooler weather. This proactive approach allows you to extend your growing season significantly, transforming your garden into a source of sustenance long after the peak summer bloom.
Vegetables to Sow in August
Several robust vegetables thrive when planted in August, offering a delicious harvest through autumn and into winter. These selections are generally hardy and can withstand varying weather conditions, making them reliable choices for the late-season gardener. By strategically planting these seeds now, you can look forward to fresh additions to your meals when other plants have finished producing.
Hardy Greens and Brassicas
August is prime time for sowing leafy greens that can mature in cooler temperatures. Kale, spinach, and various types of lettuce are excellent choices. Opt for varieties specifically bred for autumn cropping, as they tend to be more cold-tolerant and less prone to bolting (prematurely flowering) in fluctuating late-summer heat. Direct sowing into prepared beds is often the most effective method for these crops, allowing their roots to establish securely before the onset of winter.
Brassicas like Brussels sprouts, winter cabbage, and broccoli can also be sown now, provided you choose fast-maturing varieties. These plants require a longer growing period, so starting them in August ensures they reach a usable size before the severest cold arrives. Ensure the soil is well-drained and has been enriched with compost, as brassicas are hungry plants.
Root Vegetables
Certain root vegetables are well-suited for an August planting. Radishes are a fantastic option as they mature rapidly, often within a month, providing a quick crop. Sow them thinly in succession every week or two to ensure a continuous supply. Carrots and beetroot can also be sown, especially quicker-maturing varieties. These will develop into smaller, but perfectly formed, roots for autumn consumption. Ensure the soil is free from stones and has been loosened to allow the roots to grow straight and unhindered.
Turnips are another excellent choice for August sowing. They grow quickly and their roots and greens are both edible. Like radishes, sowing in succession will yield a more consistent harvest. These hardy roots offer a valuable source of nutrition as the weather turns colder.
Salad Crops for Continuous Harvest
Don't give up on salads just because summer is ending. Many salad crops can still be sown in August for a late harvest. Hardy lettuce varieties, rocket (arugula), and mizuna are good choices. For the best results, sow these in a sheltered spot or consider using fleece or cloches to protect young seedlings from any unexpectedly harsh weather. Succession sowing is key here; planting small batches every 7-10 days will provide a steady supply rather than a single overwhelming glut.
The strategic sowing of seeds in August bridges the gap between summer abundance and winter scarcity, offering a continuous harvest.
Spinach is another robust leafy green that can be sown in August. It prefers cooler conditions and will often grow vigorously through autumn, providing nutritious leaves for salads or light cooking. Ensure it has adequate moisture, especially if the weather remains dry.
Protect newly sown seeds and young seedlings from birds and slugs by covering beds with fine netting or cloches, especially during dry spells when they become more vulnerable.
Flowers and Herbs to Plant in August
While the focus is often on vegetables, August is also an opportune time to plant certain flowers and herbs that will either provide late blooms or establish themselves for overwintering and an early start next spring. These additions can bring colour and fragrance to your garden when many summer annuals have finished their display.
Late-Flowering Annuals and Perennials
For a splash of late-season colour, consider sowing seeds of hardy annuals that can germinate and grow quickly enough to flower before the first hard frosts. Examples include some varieties of calendula, cornflowers, and eschscholzia (California poppies). These are often sown directly into their final positions. If you're looking to establish perennials, August is a good time to sow their seeds, allowing them sufficient time to develop strong root systems before winter.
Perennials like echinacea, rudbeckia, and lupins benefit from being sown now. They may not flower this year, but they will establish well and be ready to put on a show the following spring. These plants offer long-term garden interest and are valuable for supporting pollinators as they emerge in the new year.
Herbs for Autumn and Beyond
Several hardy herbs can be sown in August. Parsley, for instance, is a versatile herb that can be sown now for harvesting throughout autumn and winter, especially if given some protection. Chives and hardy mint varieties are also good candidates. These herbs not only add flavour to your cooking but also contribute to the garden's biodiversity.
Coriander can be sown now, but it's prone to bolting in warm weather. Sowing in a shadier spot or using a cloche can help extend its growing season. For a more robust herb that overwinters well, consider planting seeds of thyme or oregano. These Mediterranean herbs prefer well-drained soil and will establish themselves for a strong start the following spring.
These late sowings are vital for extending the season's bounty.
Preparing Your Soil and Protecting Young Plants
Successful August planting hinges on good soil preparation and diligent protection of young seedlings. The soil conditions in late summer can be challenging – potentially dry, compacted, or already depleted from earlier crops. Addressing these issues proactively will significantly improve your chances of a good harvest from your August-sown seeds.
Soil Preparation
Before sowing, it is crucial to prepare the soil thoroughly. Loosen the soil to a good depth, especially for root crops, removing any weeds and stones. Incorporate well-rotted compost or manure to improve soil structure, fertility, and moisture retention. For root vegetables, a finer tilth is essential to prevent misshapen roots. If your soil tends to be heavy clay, adding grit can improve drainage, which is vital for preventing rot in damp autumn conditions. Ensure the area you choose for sowing receives adequate sunlight for the specific plants you are growing, though some salad crops may appreciate a little shade during warmer August days.
A slightly alkaline to neutral pH is suitable for most vegetables and herbs sown in August. If you are unsure about your soil's pH, a simple test kit can provide useful information. Amending the soil with lime can help raise the pH if it is too acidic, which benefits many brassicas and root vegetables.
Water the seedbed thoroughly the day before sowing, especially if the weather is dry. This ensures good seed-to-soil contact and provides the moisture needed for germination without the risk of washing away tiny seeds.
Protecting Seedlings
Young seedlings sown in August face a unique set of challenges. While they need warmth to germinate, they must also be protected from potential early frosts, strong winds, and pests like slugs and snails, which are often active in damp autumn conditions. Consider using row covers, cloches, or cold frames to provide a microclimate that encourages germination and protects vulnerable young plants. This protection can extend your growing season by several weeks, allowing plants to mature safely.
Fleece or netting can shield seedlings from wind damage and deter pests. For particularly cold nights, extra layers of horticultural fleece can offer vital insulation. Regularly inspect your young plants for signs of disease or pest infestation, as early intervention is always more effective. The aim is to help these plants establish strong root systems before the harshness of winter truly sets in.
Alternative Planting Options for August
Beyond direct sowing, August offers opportunities for alternative planting strategies that can also yield results. These methods can be particularly useful if you have limited space or want to maximise your harvest with minimal effort or risk.
Transplanting Seedlings
While direct sowing is common, August is also a good time to transplant seedlings that were started earlier indoors or in a nursery bed. Fast-growing crops like lettuce, spinach, and radishes can be carefully transplanted into their final growing positions. This is particularly useful if your direct-sown seeds were affected by pests or poor germination. Ensure the seedlings are hardened off before transplanting – gradually exposing them to outdoor conditions over a week or so to prevent shock.
Hardier brassicas, such as winter cabbage and kale, can also be transplanted from seedbeds into their final growing spots. This allows you to manage their growth more effectively and ensures they have ample space to develop into strong, productive plants. Water them in well after transplanting and provide a light mulch to retain soil moisture.
Spring Bulb Planting
While not for immediate harvest, August is the beginning of the season for planting spring bulbs. Varieties like tulips, daffodils, hyacinths, and crocuses are often available from late summer onwards. Planting them now allows their roots to establish over autumn and winter, guaranteeing a spectacular display of colour come spring. Choose a well-drained spot, as bulbs are prone to rot in waterlogged soil. Planting bulbs in August sets the stage for next year's garden beauty, offering a different kind of reward for your gardening efforts.
Choosing the right varieties is key for success.
Other spring-flowering bulbs, such as alliums and fritillarias, can also be planted now or in the coming weeks. Consider planting them in drifts for maximum visual impact, or in pots and containers for smaller gardens. This proactive planting ensures your garden will be vibrant and full of life when the weather begins to warm up again.
Cover Cropping
For gardeners looking to improve soil health over winter, August is an ideal time to sow cover crops. These are plants grown specifically to benefit the soil rather than for harvest. Examples include phacelia, mustard, or certain clovers. They can help suppress weeds, prevent soil erosion, improve soil structure, and even fix nitrogen. You would typically sow these after harvesting a main crop and then dig them into the soil before planting your next main crop in spring.
Cover crops offer an excellent way to replenish nutrients and add organic matter to your soil, setting the stage for a more productive growing season next year. They are a sustainable gardening practice that yields significant long-term benefits for your garden's ecosystem.