Hong Kong in September: what to plant
Averaged over the last 5 years of daily records, September in Hong Kong runs 24.9–29.6°C with about 294 mm of rain across the month. Here is what that climate actually supports.
❄️ No sub-zero nights in September in the last 5 years — frost is not the limiting factor here.
Best crops to sow now
- 🌱 Microgreens Fastest about 5 days to harvest 🪴 Windowsill pot — sheltered from outdoor weather
- 🌿 Basil about 20 days to harvest 🪴 Windowsill pot — sheltered from outdoor weather
- 🍃 Mint about 20 days to harvest 🪴 Windowsill pot — sheltered from outdoor weather
- 🧅 Chives about 22 days to harvest 🪴 Windowsill pot — sheltered from outdoor weather
- 🥢 Green Beans about 35 days to harvest Recent mean 27.3°C — right in the sweet spot
- 🥒 Cucumber about 56 days to harvest Recent mean 27.3°C — right in the sweet spot
- 🍅 Tomato about 76 days to harvest Recent mean 27.3°C — right in the sweet spot
- 🌶️ Chili Pepper about 84 days to harvest Recent mean 27.3°C — right in the sweet spot
Leave these for another month
- ⚪ Turnip — Recent mean 27.3°C is too hot (ideal 8–24°C)
- 🟣 Beetroot — Recent mean 27.3°C is too hot (ideal 7–26°C)
- 🥬 Kale — Recent mean 27.3°C is too hot (ideal 6–24°C)
Other months in Hong Kong
Temperature and rainfall are 5-year daily normals from the ERA5 reanalysis via Open-Meteo. Suitability is scored with the same degree-day model the game runs on — it is not a generic planting calendar.