Preparing for change

G’day gardeners,  

There’s a shift happening - the days are stretching a little longer, the winter chill is easing and those first hints of spring warmth are starting to work their way into our sandy soils. August is the perfect month to get ahead of the change and set your garden up for a strong season ahead. 

Here in our coastal subtropical pocket — from Bribie across to the Moreton Bay mainland and up toward the southern Sunshine Coast — the conditions are mild; the frosts are rare with the drying westerly winds sneaking up on you. Now is the time to tidy, feed the soil and plant with purpose. 

Garden beds: start with the soil 

Our local sandy soil drains freely (a blessing after heavy rain), but they also let nutrients and moisture slip away just as quickly. This is the month to rebuild them. 

Clear out any spent winter crops, old mulch and weeds while the ground is still soft. Fork through the top layer of soil without turning it too aggressively — you want to keep the soil life intact. Then dig in a generous helping of well-rotted compost or aged manure. Aim for a solid 5–8cm layer worked into the top 15cm or so. This single step does more for Bribie gardens than almost anything else: it improves water-holding capacity, feeds the microbes, and gives plants something to hold onto when the warmer weather arrives. 

Top the beds with a fresh layer of organic mulch (sugarcane, lucerne or tea-tree mulch all work well). Keep it a few centimetres away from plant stems. Mulch is your best defence against the drying winds that are common at this time of year. 

If you haven’t checked your soil pH in a while, now is the time. Most vegetables prefer something around 6–7. A simple test kit from the local nursery will tell you whether a light dusting of lime or sulphur is needed. 

Vegetable patches and gardens 

August is one of the best planting months of the year in Southeast Queensland. The soil is warming, the days are lengthening, and there’s still enough cool weather left for the last of the cool-season crops while the warm-season ones get a head start. 

You can still sow or plant: 

• Leafy greens — lettuce, rocket, Asian greens, kale, silverbeet 

• Root crops — beetroot, carrots, radish 

• Peas and bush beans 

• Spring onions and perpetual spinach 

At the same time, start thinking ahead to the warmer months. Tomato, capsicum, eggplant, zucchini, pumpkin and cucumber seeds can go into trays now in a warm, protected spot. Cherry tomatoes in particular love our climate once they get going. If your patch is already clear, you can plant seedlings of these toward the end of the month in frost-free spots. 

Succession sowing is your friend. A small handful of lettuce or rocket seed every couple of weeks keeps the harvest rolling instead of arriving all at once. 

Don’t forget the herbs. Parsley, chives, coriander (the slower-bolting types), and basil can all go in now. A few flowering companions such as calendula, borage or nasturtium will help bring in beneficial insects as the weather warms. 

Raised beds and large pots remain excellent options on Bribie — they warm up faster and give you better control over soil quality in our sandy country. 

Grasses and lawns 

Lawns are still in a quieter phase, but they benefit from a bit of attention before the spring flush hits. 

Raise the mower height and mow less often — every three to four weeks is usually enough through August. Cutting too short now only stresses the grass and invites weeds. Keep the blades sharp so the cuts are clean. 

Hold off on heavy fertilising until the soil has warmed a little more (usually later this month or into September). A light application of compost or a slow-release organic fertiliser toward the end of August can give the lawn a gentle wake-up without forcing soft growth that struggles in the still-cool nights. 

While you’re out there, deal with any weeds that have established over winter and check for bare or thin patches. A bit of top-dressing with quality compost mixed with sand can help even things out before the growing season kicks in properly. 

Water deeply but infrequently if the weather stays dry. Shallow sprinkles only encourage shallow roots. 

A few extra jobs worth doing 

• Finish any pruning of deciduous fruit trees and passionfruit vines. 

• Feed citrus and other fruit trees with a good organic fertiliser and mulch well around the drip line. 

• Keep an eye out for early aphids on new growth — a strong blast of water or a gentle soap spray usually sorts them out at this stage. 

• Check irrigation systems and timers so you’re ready when growth accelerates. 

August rewards the gardener who plans ahead. A bit of soil work now, a thoughtful plant selection and some attention to the lawn will pay off handsomely once the real spring growth arrives. 

Get out there while the weather is still pleasant, enjoy the longer days and give your garden the head start it deserves. The change is coming — best we meet it ready. 

Happy gardening, 

Mole