When to plant Stock in Arid Australia

Arid zone — applies to Alice Springs, Mildura, Broken Hill, Kalgoorlie, Port Augusta and similar areas. Growing elsewhere? Temperate · Cool · Subtropical · Tropical.

Raise stock seedlings under cover and transplant from March to August, timing them for the cool desert half of the year when nights are frosty but days stay mild. Sow the fine seed just 3 mm deep, and expect germination in 10–20 days at steady warmth. Stock is hardy and takes a long 140 days to reach full spikes of scented bloom, so autumn sowing gives Alice Springs and Broken Hill gardeners flowers through late winter and early spring. Space transplants 20–40 cm apart with 20–30 cm between rows, in a bed that gets full sun and free-draining soil.

Sowing calendar — arid zone

Green months are your sowing window: March to August.

Growing notes

Stock rewards the cool season in arid gardens and sulks in heat, so the whole strategy is to establish plants while nights are cold and let them build up for a late-winter show. Transplant seedlings into ground that has been improved with compost, keep them mulched, and water deeply but let the surface dry between drinks — constant wet around the crown is the fastest way to lose them.

The common failure here is stem rot and damping-off from overwatering in cool, still conditions. In Mildura and Port Augusta, water in the morning so foliage dries by evening, and avoid crowding — that 20–40 cm spacing exists to keep air moving. If lower stems go soft and black, ease off the watering and improve drainage rather than feeding.

Stock needs a spell of cold to flower well, which arid nights supply readily. Feed lightly with a balanced fertiliser once plants are established, then switch to something lower in nitrogen as buds form so you get spikes rather than lush leaf. Pick or deadhead spent stems to keep the plant tidy. Once the first real heat arrives in spring, plants will finish quickly, so enjoy them while the weather holds.

Stock at a glance

Common questions

when to plant stock seeds in Alice Springs

Sow stock from March to August, raising seedlings under cover through autumn and winter. This lets plants establish in cool weather and flower in late winter to spring before the desert heat arrives. Avoid sowing into summer, when high temperatures stop them flowering well.

why is my stock not flowering

Stock needs cool nights to trigger flowering, and too much nitrogen keeps it producing leaf instead. Make sure you sowed in the cool season and switch to a low-nitrogen fertiliser as buds form. In arid zones the cold nights usually do the job on their own.

how deep to sow stock seed

Sow stock seed about 3 mm deep into a fine, moist mix. The seed is small, so barely cover it and keep the surface damp until seedlings appear in 10 to 20 days.

does stock need full sun

Yes, stock flowers best in full sun with free-draining soil. In hot arid gardens it still wants full winter sun, but the timing to the cool season matters more than shade.

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