Stayin’ grounded
G’day gardeners. Late October on Bribie and the Sunshine Coast is prime time for plants that hug the ground—whether they’re living carpets that lock down our free-draining sands or the big-leafed vines of pumpkins and watermelons that love the heat. Our sandy soils warm quickly and drain fast (great for avoiding root rot), but they also lose moisture and nutrients quickly, so a bit of preparation goes a long way.
Ground covers and creepers for coastal sands.
These tough natives and near-natives thrive in the sun, salt air and sandy ground around Bribie, Pumicestone and Moreton Bay. They suppress weeds, cool the soil, hold moisture and stop erosion on banks and open patches.
Pigface (Carpobrotus glaucescens): The classic coastal creeper. Fleshy leaves store water which spreads fast and stabilises sand blessing us with bright pink-to-purple daisy-like flowers. Low care once established.
Fan Flower (Scaevola species): Dense trailing habit, continuous colour, and excellent tolerance of salt, wind and poor soils.
Creeping Boobialla (Myoporum parvifolium): Forms a thick mat, handles drought after the first season and works well for covering ground or spilling over edges.
Casuarina ‘Cousin It’ (prostrate form): Needle-like foliage, great for erosion control on slopes and exposed spots.
Snake Vine / Climbing Guinea Flower (Hibbertia scandens): Vigorous native that can be used as a ground cover; bright yellow flowers.
Plant them now while the soil is warm and there’s still some moisture around. Dig in compost or a sandy loam mix to help establish them, water deeply to settle the roots, then mulch. Once established most need little watering. Avoid high-phosphorus fertilisers if you’re near natives that are phosphorus-sensitive.
Pumpkins and watermelons: The big ground-dwellers.
Both are warm-season cucurbits that thrive in our subtropical climate. Soil needs to be consistently warm (ideally 18 °C+ for pumpkins, closer to 21 °C+ for watermelons) before you sow—conditions we have right now through to December (and even into early next year for some plantings).
When to plant:-
Pumpkins: August to January/February; September is often the sweet spot, but late October is still excellent. Queensland Blue, Jarrahdale, Butternut and Kent are reliable local choices.
Watermelons: August–December (best results usually September–December). Look for Crimson Sweet, Sugar Baby (more compact) or similar.
Later sowings can run into the wetter, more humid part of summer and pick up mildew, so aim to get them established soon.
How to plant and care:-
Soil prep – Dig in plenty of compost or well-rotted manure. On pure sand, raised mounds or ridges (20–30 cm high) improve drainage and warm the root zone faster. Aim for roughly pH 6–7.
Sowing – Direct sow is best (they dislike root disturbance). Plant 2–3 seeds 2–3 cm deep per spot, then thin to the strongest seedling. Space pumpkins about 1.5–2 m apart (vines can run several metres); watermelons similar or a bit more room between rows.
Sun and water – Full sun (6–8+ hours). Water deeply but less often so roots go down; daily light sprinkling encourages shallow roots and fungal problems. Water at soil level, not over the leaves. Reduce watering in the last couple of weeks before harvesting for sweeter fruit.
Mulch and support – Thick organic mulch keeps moisture in and soil cooler. Lift developing fruit off the ground with a tile, brick or bit of straw to avoid rot. You can train vines up a fence or trellis if space is tight, but most do well sprawling.
Feeding and pollination – They’re heavy feeders—side-dress with compost or a balanced organic fertiliser once they start running. Bees do the pollination; if fruit set is poor in cool or wet spells you can hand-pollinate by transferring pollen from male to female flowers in the morning.
Watch-outs – Powdery mildew is the main subtropical issue in humid weather. Good spacing, airflow and soil-level watering help. Remove badly affected leaves. Fruit fly can be a problem later; netting or other controls may be needed as fruit develops. Crop rotation helps with longer-term disease pressure.
Sweet potato is another excellent dual-purpose ground cover for the same conditions—plant slips now through early summer, and the vines will smother weeds while you harvest tubers later. They love the warm, well-drained sandy soils once improved with organic matter.
Quick local tips.
Amend sandy beds generously with compost before planting anything that will be there a while.
Mulch is non-negotiable in our climate—it saves water and protects the soil.
Local suppliers on Bribie and the Sunshine Coast stock suitable mixes, mulches and native ground covers if you don’t want to start everything from seed or cuttings.
Get these in the ground over the next few weeks and you’ll have living carpets covering bare sand plus the prospect of home-grown pumpkins and watermelons for the warmer months ahead. Stayin’ grounded never looked so good. Happy planting!
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