What to Plant in December, Adelaide & SA

33 crops you can sow in December across Adelaide & SA.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

In Season This Month

All December Crops at a Glance

Plant	Category	Harvest	Spacing	Companions
Aloe Vera	Herb	365d	40cm	Succulents, Herbs
Basil	Herb	65d	25cm	Tomato, Capsicum, Oregano
Beans (bush)	Fruiting	65d	20cm	Corn, Carrot, Cucumber
Broccoli Sprouts	Micro	7d	1cm	n/a
Brussels Sprouts	Brassica	120d	60cm	Beetroot, Onion
Cauliflower	Brassica	100d	55cm	Beetroot, Celery, Onion
Cosmos	Flower	60d	30cm	Tomato, Beans, Capsicum
Cowpeas (Southern Peas)	Fruiting	70d	15cm	Corn, Sorghum, Cucumber
Cucumber	Fruiting	60d	50cm	Beans, Corn, Nasturtium
Edamame	Fruiting	80d	15cm	Corn, Cucumber, Marigold
Lablab	Fruiting	70d	30cm	Corn, Sunflower
Lima (Butter) Beans	Fruiting	90d	20cm	Corn, Cucumber, Sunflower
Marigold	Flower	50d	25cm	Tomato, Beans, Capsicum
Oyster Mushroom	Mushroom	21d	0cm	n/a
Pea Shoots	Micro	12d	1cm	n/a
Popcorn	Fruiting	120d	30cm	Beans, Pumpkin, Lettuce
Queensland Arrowroot	Fruit	300d	100cm	n/a
Radish Sprouts	Micro	8d	1cm	n/a
Shiitake	Mushroom	60d	0cm	n/a
Silverbeet	Leafy	60d	30cm	Beans, Onion, Lettuce
Snake Beans	Fruiting	55d	20cm	Carrot, Corn
Sorghum	Fruiting	120d	15cm	Cowpea, Beans
Spring Onion	Root	60d	10cm	Carrot, Lettuce, Tomato
Sunflower	Flower	80d	50cm	Cucumber, Corn, Tomato
Sunflower Microgreens	Micro	10d	1cm	n/a
Sweet Corn	Fruiting	90d	30cm	Beans, Pumpkin, Zucchini
Sweet Potato	Root	150d	50cm	Beans, Corn, Marigold
Thai Basil	Herb	60d	25cm	Tomato, Capsicum, Eggplant
Vietnamese Coriander	Herb	40d	30cm	Chilli, Eggplant
Vietnamese Mint	Herb	60d	30cm	n/a
Warrigal Greens	Leafy	60d	60cm	n/a
Zinnia	Flower	60d	25cm	Tomato, Beans, Cucumber
Zucchini	Fruiting	60d	80cm	Nasturtium, Corn, Beans

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One-page A4 landscape PDF with every December crop for Adelaide & SA.

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Frequently Asked Questions

What vegetables can I plant in December in Adelaide?

December in Adelaide is summer, so focus on crops suited to Mediterranean conditions at this time of year. Check the full planting list above for every vegetable, herb, and fruit you can sow or transplant this month, with spacing and harvest timing included.

How do I keep my Adelaide garden alive in the December heat?

Water deeply in the early morning before the heat sets in. Mulch beds 8 to 10 centimetres deep to retain moisture and cool the soil. Use shade cloth (30 to 50 percent) over leafy greens and lettuce. Prioritise heat-tolerant crops like sweet potato, okra, and beans.

How often should I water my vegetable garden in December in Adelaide?

Watering frequency depends on your soil type and weather. In December in Adelaide, check the soil moisture by pushing your finger 5 centimetres into the soil. If it feels dry, water deeply. Mulch reduces watering needs significantly. Most vegetable gardens need deep watering two to three times per week rather than light daily sprinkles.

How do I manage water restrictions when gardening in Adelaide in December?

Adelaide's water restrictions vary by season. Use drip irrigation and soaker hoses to water efficiently. Mulch beds heavily with straw or lucerne to reduce evaporation. Consider installing a rainwater tank and using greywater on ornamentals. Wicking beds are excellent for growing vegetables with minimal water.

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What to Plant in December, Adelaide & SA

In Season This Month

Fruiting (11)

Herb (5)

Micro (4)

Flower (4)

Leafy (2)

Mushroom (2)

Root (2)

Brassica (2)

Fruit (1)