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Writer's pictureKerri Cuthbert

Essential Tips for Gardening in August

Gardening Advice August

1. Planting Preparation

Preparing for autumn tree planting is crucial for establishing healthy and robust trees. Start by thoughtfully selecting suitable areas in your garden, considering factors such as sunlight, space, and proximity to other plants and structures. Enrich the soil by incorporating well-rotted organic matter, such as compost or manure, to improve the soil's texture and fertility. Good soil preparation is essential, as it ensures that the young trees have access to the necessary nutrients for healthy growth. Additionally, ensure proper drainage to prevent waterlogging, which can lead to root rot and other issues. You can improve drainage by creating raised beds or incorporating sand and grit into heavy clay soils. It's also beneficial to test the soil pH and adjust it if necessary, as most trees prefer slightly acidic to neutral conditions. Planning ahead in August allows you to address any soil deficiencies and make the necessary adjustments. By taking these steps, you'll create optimal growing conditions for your new trees, giving them the best start possible as they establish themselves in your garden. This preparation not only enhances the health and vitality of your trees but also contributes to the overall beauty and productivity of your outdoor space.


2. Garden Clean-up

As summer comes to a close, it’s essential to engage in thorough garden clean-up to maintain a healthy and vibrant garden. Begin by clearing away spent annuals that have completed their lifecycle, as these plants can become unsightly and may harbour pests and diseases. Carefully trim back perennials and other plants that have finished blooming, making sure to remove any dead or diseased foliage. This not only keeps your garden looking tidy but also promotes healthy new growth and flowering in the following seasons. Removing garden debris is crucial in preventing pests and diseases from overwintering in your garden. Diseased plant material should be disposed of properly to avoid spreading pathogens, while healthy plant material can be added to your compost pile. Composting organic matter not only recycles nutrients back into your garden but also enriches the soil, improving its structure and fertility over time. Take this opportunity to inspect your garden for any signs of pest infestations or disease and address them promptly. Mulch any bare soil to suppress weeds, conserve moisture, and regulate soil temperature. A thorough garden clean-up in August sets the stage for a healthier and more productive garden in the coming months, ensuring your plants have the best conditions to thrive.

Cutting off dead flowers

3.Seed Collecting

Collecting seeds from your favourite flowers and vegetables is a rewarding and cost-effective way to prepare for next year's planting. It allows you to preserve the best traits of your garden plants and ensures you have a ready supply of seeds for future seasons. Begin by identifying the flowers and vegetables from which you want to collect seeds, choosing healthy, robust plants that exhibit the qualities you desire, such as vibrant blooms, strong growth, or excellent flavour. Allow the seed pods to dry on the plant before harvesting, as this natural drying process ensures the seeds are mature and ready for storage. Depending on the plant, you may need to wait until the pods turn brown and start to split open. Once the pods are dry, carefully collect the seeds. For flowers, this might involve shaking the seeds out of the pods or heads; for vegetables, it might mean extracting seeds from the fruit and allowing them to dry further. After collecting the seeds, store them in a cool, dry place to maintain their viability. Use paper envelopes or small glass jars to store the seeds, as these materials allow for proper air circulation and moisture control. Clearly label each container with the plant's name and the date of collection to keep track of your seed inventory, ensuring you use them while they are still fresh and viable. By collecting and storing seeds from your favourite plants, you can enjoy a continuous cycle of growth and harvest in your garden. This practice not only saves money but also helps preserve plant varieties that you love, allowing you to share seeds with friends and neighbours and contribute to the biodiversity of your local environment.


4. Plant Division

Dividing overcrowded perennials is a crucial gardening task that promotes healthy growth and rejuvenates your plants. Over time, plants can become overcrowded, leading to fewer blooms and increased susceptibility to diseases. To maintain the health and vitality of your garden, it’s important to periodically lift and divide these plants. Early autumn is the ideal time to lift and separate these plants. Start by carefully digging up the entire clump of the plant, being mindful not to damage the roots. Use a garden fork or spade to gently lift the plant from the ground. Once lifted, shake off excess soil to expose the root system. You will often see natural divisions or smaller clumps within the main plant. Using a sharp knife or spade, carefully separate these clumps, ensuring each division has a healthy portion of roots and shoots. Replant the divisions promptly to give them ample time to establish before winter. Choose a well-prepared planting site with good soil and adequate sunlight, tailored to the specific needs of the plant. Enrich the soil with compost or well-rotted organic matter to provide essential nutrients. Water the newly planted divisions thoroughly to help them settle in and encourage root development. Applying a layer of mulch around the base of the plants can help retain moisture, suppress weeds, and protect the roots from temperature fluctuations. By dividing your plants now, you not only enhance their health and blooming potential but also have the opportunity to expand your garden or share plants with friends and neighbours. Regularly dividing plants ensures a vibrant and flourishing garden year after year.

dividing plant roots

5. Herb Harvest

Harvesting herbs like basil, oregano, and parsley is essential for capturing their peak flavour and ensuring the health of your plants. To start, choose a dry morning after the dew has evaporated but before the heat of the day to pick your herbs, as this is when their essential oils are most concentrated. Use clean, sharp scissors or pruning shears to cut the herbs, taking care to snip just above a leaf node or set of leaves, which encourages new growth. Regularly harvesting your herbs not only prevents them from flowering, which can cause the leaves to become bitter, but also promotes bushier, more productive plants. Once harvested, you can either dry or freeze the herbs to preserve their flavours for use throughout the winter. To dry herbs, bundle small bunches together and hang them upside down in a warm, well-ventilated area away from direct sunlight. Alternatively, you can spread the herbs on a drying rack or use a dehydrator. Once fully dried, store the herbs in airtight containers in a cool, dark place. For freezing, chop the herbs and place them in ice cube trays with a little water or olive oil, then transfer the frozen cubes to a freezer bag for easy portioning. By harvesting and preserving your herbs, you can enjoy their fresh, robust flavours all year round, while also maintaining the health and vitality of your herb garden.


6. Green Manure

Sowing green manures such as clover, mustard, or phacelia in empty vegetable beds is a highly effective way to improve soil health and prepare your garden for future planting. These plants serve multiple purposes: they enhance soil structure, increase nutrient levels, and suppress weed growth. Begin by selecting the appropriate green manure for your specific needs and climate. Once chosen, clear the vegetable bed of any remaining debris and lightly rake the soil to create a fine tilth. Broadcast the seeds evenly over the surface and gently rake them in, ensuring good seed-to-soil contact. Water the area thoroughly to help the seeds germinate. As the green manure grows, its roots will break up compacted soil, enhancing aeration and drainage. When these plants are later dug into the soil, they decompose and release valuable nutrients, such as nitrogen, improving soil fertility. Additionally, the dense growth of green manures acts as a natural mulch, reducing weed germination and competition. Allow the green manure to grow until just before it flowers, then cut it down and dig it into the soil, allowing a few weeks for decomposition before planting your next crop. By incorporating green manures into your gardening routine, you create a healthier, more productive soil environment, setting the stage for successful future harvests.



As September arrives, our gardens begin to transition into the rich hues of autumn. The vibrant colours of summer give way to a tapestry of golden leaves and late-blooming flowers. It's a time of harvest and preparation, with ripening fruits and vegetables ready to be gathered. Each day brings new opportunities to nurture our outdoor sanctuaries, ensuring they remain beautiful and productive as the season changes.

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