Gardening in Waitaki April 14th 2026

Autumn is putting on a magnificent display around Lake Aviemore and throughout the Waitaki Valley. There is a natural rhythm to this season, growth slowing, energy retreating, and the garden preparing to rest. By working alongside these changes, tidying, composting, planting, and protecting, we set the garden up for a strong and healthy return in spring. Now it’s time to focus on some serious garden tidying before winter sets in. There is plenty of cutting back to be done, along with light hedge trimming. Compost heaps will benefit from nitrogen-rich activators such as coffee grounds, hen manure or comfrey leaves to speed decomposition. Oak and magnolia leaves, which are slower to break down, can be burned and the ash added back into the compost. Time for seed saving, with many plants naturally dispersing seed. Collect and store in paper bags once fully matured. Perennials like daylilies can be divided now, and bearded iris should have rhizomes exposed to the sun to bake and reduce disease. Rose garden: Remove and dispose of all diseased foliage from both plants and the surrounding ground to prevent the carryover of black spot, rust, and mildew. A lime sulphur spray next month will assist with winter clean-up. Shrubs such as camellias, rhododendrons, and azaleas can be shifted now, but remember to reduce the top growth by about a third to compensate for root disturbance. Larger shrubs are best trenched now and moved in late winter. Potted shrubs will benefit from feeding, particularly with acid fertiliser for those that prefer it. While many of us are busy raking leaves, it’s worth remembering that nature’s intention is for leaf fall to nourish the soil and trees. Leaves make excellent compost when layered with green waste, manure, and finished compost. Add moisture as you build, then cover the heap with whatever you have on hand—old carpet, polythene, or similar—to retain heat and encourage breakdown. Avoid leaving heavy layers of leaves on garden beds, as they can shelter overwintering pests such as snails and slugs, particularly those beneath plants like hellebores, heuchera, and hostas. Thick leaves also act as a rain barrier on the soil. Rake leaves onto the lawn and run over them with your lawn mower, then they can be returned as garden mulch. Lawns begin to slow as conditions dry and cool. Raise mower blades to avoid stressing the grass and reduce traffic where possible. De-thatching can be done if needed, and autumn remains an excellent time to sow new lawns or repair thin patches while the soil still holds warmth. A light dressing of sifted compost worked into the surface will improve both heavy and sandy soils. Fruit, continue harvesting late apples, pears, and peaches, taking care to store only undamaged fruit. Feijoas are a seasonal highlight, continuing to ripen into winter and offering both flavour and nutritional benefits. Apply clean-up sprays to fruit trees showing signs of disease, and consider a dressing of lime and potash to support next season’s crops. Citrus will benefit from feeding and mulching, while strawberry beds should be tidied, with runners removed and a few strong ones potted up for renewal. Vegetable gardens are winding down, but there is still time to sow green crops to improve soil structure and fertility. Clear spent crops before they go to seed and dig them back into the soil as humus. Continue planting winter vegetables, and harvest pumpkins before frost, allowing them to finish ripening in a warm, dry place. In glasshouses, reduce watering as growth slows.

Plant up strawberry runners.