12/09/2026
Before you plant tomatoes outside, take one more look at the overnight forecast.
September brings warmer days, but Waikato nights can still be cold.
Crops that are happy to get started now include peas, lettuce, spinach, silverbeet, spring onions, radish, beetroot, carrots and many herbs.
Warm-season seedlings such as tomatoes, capsicums and eggplants can keep growing under protection while the soil and night temperatures catch up. If you are hardening them off, introduce outdoor conditions gradually rather than moving them from a sheltered space straight into full sun, wind and cold.
The calendar gives us a guide. The conditions in our own garden give us the final answer.
What are you planting this weekend?