What to plant in Shanghai in September
September in Shanghai marks the transition into autumn, offering highly favorable conditions with an average temperature of 25.7°C and reliable rainfall (189.3 mm). The mild weather allows for full outdoor sowing and transplanting of cool-season vegetables, leafy greens, and brassicas before late autumn cooling begins. Gardeners should capitalize on the lingering warmth and ample sunshine to establish autumn crops rapidly.
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Bok Choy (Shanghai Pak Choi)
Sow directly outdoors; optimal conditions allow harvest within 30-40 days.
Radish
Sow seeds 1 cm deep directly into loose soil to allow proper root development.
Spinach
Direct sow as September night temperatures begin to settle.
Carrot
Direct sow in deep, well-draining soil free of stones.
Lettuce
Can be sown directly or started in seed trays for transplanting later.
Garlic Chives
Sow in clusters or lines along garden borders.
Mustard Greens
Sow directly outdoors for thin-harvesting as baby leaf greens.
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Cabbage
Transplant pre-grown seedlings into well-composted beds, spacing 40 cm apart.
Broccoli
Plant robust transplants deep into the soil to support firm stem growth.
Cauliflower
Transplant healthy nursery stock; protect young plants from heavy rainfall downpours.
Tasks
Monthly tasks
Clear out finished summer crops and incorporate compost into beds to prepare for autumn cool-season crops. Monitor for pests such as caterpillars on young brassicas during warm early September days. Ensure drainage channels are clear, as September historically brings 189.3 mm of rain, which can lead to temporary standing water.