Spring Gardening Tips in Canterbury
As I write, the rain is falling – much-needed to give Spring a proper top-up of moisture in the soil before the demands of Summer arrive. Labour Weekend is the traditional time when the soil and daytime temperatures are warm enough to plant and sow all the plants that need warmth to grow. Spring bulbs will soon finish flowering and should be left with their foliage intact to ensure blooms next season; only remove the foliage once it has fully dried off.
The weather has been warm with plenty of sunshine, and plants have been growing very well. I’ve noticed early signs of aphids and mildew on some of my plants, so I’ve sprayed for these before they become problematic. Citrus plants are now entering their growth phase, making it the ideal time to give them a feed and check for any signs of aphids and whitefly, which can lead to sooty mould on the foliage later in the season.
Pip fruit will be in flower or just finishing. Once the petals have fallen, sprays can be applied to control codling moth, aphids, and mites; also, a fungicide for mildew and black spot sprayed this month will help with early control before disease pressure builds.
Lawns will be growing quickly now, with grass producing stalky seed heads. Fertiliser and regular mowing will keep them looking tidy. This month is also the time to plant dahlias, chrysanthemums, begonias, and gladioli – I always add any supports needed as I plant the young plants.
Tomatoes growing in the greenhouse will now be thriving; regular watering will help prevent blossom-end rot as the fruit ripens. Other indoor crops, such as chillies, peppers, and cucumbers, may benefit from weekly liquid feeds to encourage growth. Good ventilation on hot days will help keep temperatures around 25°C, reducing plant stress and keeping them healthy. Most greenhouses will also need shading during the hottest Summer months to prevent overheating.
As flowering shrubs finish blooming, prune any that need it before they start their next growth phase. This month is a busy time in the garden, with planting, weeding, and watering. It’s better to get these tasks done today rather than leaving them until tomorrow, as that may be too late.
Love the Garden, Michael Coulter
Remember: questions can be posted on HortTalk our online facebook group or you can email Michael directly at: coultchrys@xtra.co.nz