Gardening in Waitaki April 21st 2026

We’ve certainly had a sharp taste of winter temperatures this week, hardly inviting weather for long days in the garden. Still, autumn is putting on a magnificent

display, with colours deepening beautifully as the month progresses, more than making up for the chill in the air.Now is the time to begin bedding the garden down for winter. Cut back tired summer perennials and annuals that have become long and straggly, clearing space for a generous layer of compost around each plant, followed by perhaps pea straw mulch.  Soft green waste can go straight into the compost heap, while tougher, woody material is best shredded or discarded. The more organic matter you return to the soil, the more your garden will reward you in the seasons ahead. Hydrangeas are still putting on a splendid show—leave them be for now, but it’s an excellent time to take hardwood cuttings for future plants. Remember, patience is needed, as these take a few seasons to develop into substantial bushes. There is still time along the coast to sow seeds outdoors and grow them on to pricking-out size before growth slows. Seedlings potted up now and nurtured through winter will be far stronger than spring-bought alternatives. Outdoors, sow alyssum, aquilegia, calendula, cornflower, lupins, statice, stock, and sweet peas. Under cover, sow antirrhinums, dianthus, pansies, violas, poppies, scabious, sweet William, polyanthus, primrose, and primulas. Evergreen shrubs (excluding conifers) are best planted now or left until after winter, while deciduous trees and conifers cope better with colder conditions. Get hedges trimmed before frost arrives, as this will likely be the last cut until spring. Continue cutting back plants like large daisies and lavatera on the coast to encourage fresh flowering. Lift gladioli once the foliage dries off, dry the corms thoroughly, dust them with flowers of sulphur, and store in paper bags or old pantyhose, never plastic.  Leave peony roses undisturbed; simply cut back dead tops and dispose of them to avoid any carried-over disease. Spring is the time to divide if needed. Roses will benefit from a feed now, as garden soil is depleted of nutrients by autumn; unfed roses will weaken and lack the strength for lush flowering next year. Firstly, remove all dropped leaves under rose bushes, then apply aged stable manure, along with rose fertiliser for the best results. Lawns should begin to slow down. Apply lime now to improve soil condition by spring, and avoid walking on wet grass to prevent compaction. Watch for grass grub. If birds are pecking and patches are browning, treat promptly, as May is your last chance before grubs finish eating roots and burrow deep. vegetable garden, protect pumpkins from frost. Around Anzac Day is the traditional time to plant broad beans, if you haven’t yet. Sow spinach, snap peas, Brussels sprouts, and spring onions.  Grow veg seedlings on to a good size before planting, because many slugs will be active while the soil is wet. Protect seedlings from slugs with a coarse mulch layer that can deter slugs by making movement difficult. Slug Collars: Small collars made from plastic or metal placed around individual plants act as protective fences. Beer traps attract slugs to fermenting yeast: Bury shallow containers filled with beer so their rims are at soil level. Slugs crawl in and drown. Replace the beer every few days to avoid foul odours. Finish harvesting potatoes and store them in a cool, dry place. Fruit: Mature fruit can be harvested and ripened spread out in a warm, sunny spot befor storing. Cheers, Linda.

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.

Gardening in Waitaki April 14th 2026

What an early introduction to winter wet received this week! Autumn is a time for reflection and planning. With cooler mornings and brilliant colour all around, April reminds us that although growth slows, the garden is far from sleeping; it is quietly preparing for the promise of spring. Once outside again, it will be back to the inevitable autumn task, leaves, leaves, and more leaves. While the workload can feel endless, the reward is a garden glowing in magnificent shades of gold, red, and orange. Truly, autumn is a second spring, when every leaf becomes a flower.

b>Most fallen leaves make excellent compost, although oak and walnut leaves take much longer to break down. I did compost some mixed with grass clippings, but I burned the excess in my trusty drum, returning the ash to compost heaps later. Keep layering compost bins with leaves, grass clippings, manure, and garden waste, watering between layers to encourage decomposition while warmth remains in the soil. Recent damp conditions have helped retain moisture in the ground, giving shrubs such as hydrangeas, camellias, rhododendrons, and azaleas an opportunity to harden wood before winter. Hydrangea blooms are now turning rich autumn tones, perfect for picking and drying by hanging upside down or leaving in a vase until the water evaporates. Leucadendron, protea, nandina, and nerines also provide excellent winter colour and long-lasting cut flowers. Nerines are now taking centre stage, sending up elegant flowers on tall stems and thriving in well-drained positions with little water during dormancy. Give winter flowering shrubs a dressing of compost as many are already forming buds. Only feed plants preparing to flower now; most others are slowing growth ahead of winter rest. On the coast, prune perennial wallflowers, mignonette, dentata lavender, and marguerite daisies to encourage fresh winter growth. Inland gardeners are better to take hardwood cuttings and overwintering them under protection, as frosts often damage established plants. Divide violas and clumping primulas now — one plant quickly becomes many and provides beautiful edging for spring displays. Trim spent flower heads from hebes to prevent legginess, Ranunculus corms are still available and well worth planting. Soak overnight before planting claws downward in groups for best effect. Lilies may be lifted only if overcrowded, keeping roots moist at all times, and replanted deeply, about three times the bulb height, except Madonna lilies, which prefer shallow planting and limy soil. Autumn remains an excellent time to plant evergreen shrubs and give hedges a final light trim. Small shrubs, conifers, camellias, azaleas, and rhododendrons transplant well now while soils are still warm. Peonies can also be moved once foliage yellows, planting crowns shallowly with buds just 5 cm below soil level. Lawns are responding well to cooler nights and renewed moisture. Repair grass grub damage by raking and resowing. Treat compacted areas with gypsum and fine compost while the soil is soft and moist. During the rain is a perfect time to spread. Vegetable Garden: Green manure crops are valuable in vacant beds, oats are ideal for autumn sowing, while blue lupins add nitrogen. Protect young veg seedlings from birds with raised netting. Broad beans can be planted now, adding a little potash beneath the seeds to help prevent rust. Leeks, carrots, spinach, snap peas, and spring onions can all be sown or planted. Remove shading from glasshouses and reduce watering as growth slows. Harvest pumpkins, always leaving the stalk attached to prevent rot. b>Fruit Garden: Apples, crabapples, quince, grapes, feijoa, and late peaches are ready for harvest and preservation. Pick surplus apples slightly unripe for storage, but leave some to ripen naturally on the tree. Gather walnuts promptly before pests find them, spreading them out in a dry, airy space so the green husks can dry and separate naturally. Feed citrus trees generously now with manure, seaweed, rock phosphate, dolomite, or citrus fertiliser, followed by mulch Cheers, Linda