Marlborough has a reputation as one of New Zealand's sunniest, driest regions, and for the most part that's exactly what a spring garden here gets: reliable warmth and low humidity that keeps blight and mildew pressure well down compared to wetter parts of the country. What the reputation doesn't capture is how long the region's frost season actually runs. Blenheim averages fourteen ground-frost days in July, and the season doesn't clear until November, later than many gardeners expect from a place known mostly for its summer weather.
Lettuce, spinach, silverbeet, peas, beetroot, carrots and dwarf beans are safe from September either way. Tomatoes, capsicums, courgette and sweetcorn are worth holding until November here specifically, rather than trusting the daytime warmth of an early spring week. Basil is worth the same caution: it's genuinely frost-tender, and Marlborough's last frost can arrive well after a run of warm, sunny days has made it feel like winter is long over.
Once the risk has passed, the region's dry climate means consistent watering, rather than feeding or pest control, is the main ongoing job. Marlborough's spring rain is lighter and less reliable than the North Island's, so a new planting left to the weather alone will show it faster than it would further north.
Once the risk has passed, the region's dry climate means consistent watering, rather than feeding or pest control, is the main ongoing job.