August New Zealand Gardening Calendar

August New Zealand Gardening Calendar

The days are getting noticeably longer, and slightly warmer for this New Zealand gardening calendar month. Spring bulbs are flowering or close to it.

Tasks For This Months

General For August Gardening Calendar

It’s the start of the busiest season for gardeners, so you need to make the most of any good weather breaks to get outside to garden. You need to finalise any plans you’re making and get ready to implement them. If you need professional help from a gardener on the North Shore of Auckland , then you can contact me.


Finish all your pruning as soon as possible.


Finish planting all trees and shrubs, so they will get the full spring period to grow and get established before any dry spells.

If you wanting to plant any deciduous trees, you need to get onto it as soon as possible, before the nursery stocks are sold out. Sometimes there are sales of deciduous trees at this time of year, but it tends to the left over stock.

Food Gardening


Keep harvesting anything that looks decent, and clear out all the spent plants and weeds. It’s a good time to check your soil Ph , to determine if you need to add any lime. You can buy soil test kits at most good garden centres. Soils have a tendency to become acidic over time. Lime reduces acidity. For most veges a soil Ph of about 6.5 is reccommended.

Spread a layer of compost over your vegetable beds, and if you’re the digging type, then dig it in.

Start making successive planting and/or seed sowings of hardy veges, bearing in mind you don’t want a large number of any one crop all maturing at the same time. This is avoided by sowing and planting at between two to four week intervals.

In cold districts you may need to sow your seeds under shelter, in containers. Some areas may need an artificial heat source.

Veges to sow –

Warm districts – cabbage, celery, lettuce, onions,spring onion, silverbeet, spinach, carrots, parsnips, beetroot, peas and radish.

Cold districts – parsnips, turnips, swedes, peas and broad beans.

Plant –

Asparagus crowns.

Early potatoes after leaving them in the sun for 7-10 days to get the buds to start sprouting.

Rhubarb – Either sow seeds or buy small plants, or divide large existing plants.

Tomatoes in warm districts in greenhouses.


Frost resistant herbs can be in warm districts. Parsley, rocket, dill.

Fruit Trees

Pip and Stone Fruit –

For August New Zealand Gardening Calendar finish pruning deciduous trees as soon as possible. Burn or dispose of prunings away from your property as rotting branches can harbour and spread fungus diseases, such as silver leaf, that can kill your stone fruit trees.

Apply a fungicide spray of copper oxychloride or Bordeaux to stone and pip fruit trees.

Grafting- If you want to graft your pip or stone fruit trees, take scion wood, generally small twigs up to pencil thickness. Wrap them in plastic and store them in the fridge until late September- early October when they can be grafted onto the rootstock, or larger trees.

Citrus –

Most citrus are reaching maturity and ready for harvesting when little or no green is visible on the skin. Although Tangelos increase sweetness if left a bit longer.

It’s best not to leave the fruit on the tree too long, as the tree will take the moisture back out of the fruit leaving it tasting dry. Leaving the citrus fruit on too long also reduces flowering and results in a lighter crop next season.

Fejoa trees can be pruned to open them up.

Kiwi fruit needs to be pruned as soon as possible, because they can weep sap when pruned too late.

Berry fruits –

Raspberries, blackberries, boysenberries, and loganberries. – Finish pruming and remove old spent canes and burn or dispose off site.

Goose berries and Blackcurrants- Finish pruning.

Stawberries, plant them soon and keep in mind the berries wil need protection from birds and snails and slugs.

Green Houses/Glass houses

For August New Zealand Gardening Calendar remove any dead matter, weed and apply compost, and dig in if preferred. Plant tomatoes for an early season crop. Sow seeds in containers for transplanting outdoors later if you want a head start on the growing season. Apply snail and slug control measures.

Pot and Container Grown Plants

Remove dead leaves and dust with a damp cloth or spray. Re-pot in to a larger pot with fresh potting mix if they appear to be root bound.

Give them some slow release fertiliser, and kill any insects on them.

Ornamental Garden


Rose pruning must be finished for August New Zealand Gardening Calendar. Spray with a combination of copper oxychloride and spraying oil.

Mulch with compost, around root zone, but keep it off the crown.


For August New Zealand Gardening Calendar remove weeds and apply snail and slug control measures to educe any winter population build up.

Sow seeds of: alyssum, begonia, californian poppy, carnation, celosia, chrysanthemum, cosmos, dahlia, delphinium, dianthus, gypsophila, honesty, nemesia, marigold, pansy, petunia, phlox, portulaca, salvia, snapdragon, sunflower, verbena, viola, viscaria, and zinnia,.

Plant seedlings of: alyssum, aquilegia, canterbury bells, carnations, cornflower, cosmos, cineraria, delphinium, pansies, polyanthus, poppy, gypsophila, forget-me not, hollyhock, stock, and viola, .

Lift and divide and replant clumps of perennials.

Plant dahlia and begonia tubers.

Trees and Shrubs

For August New Zealand Gardening Calendar Prune existing trees and shrubs For August Gardening Calendar.

Plant any new trees and srubs now before the growing season really gets going.

Lawns In New Zealand Gardening Calendar

For August it’s best to mow when the ground is not too wet, or you get permanent mower wheels tracks around the area.

Compost For August New Zealand Gardening Calendar

For August New Zealand Gardening Calendar make new compost heaps by incorporating dead leaves, grass clippings, vegetable scraps with a sprinkling of lime and animal manure etc. Turn and mix existing compost heaps that haven’t decomposed sufficiently. Heaps that consist of predominantly unrecognisable matter are ready to be spread around planted areas as a mulch, or in preparation for digging in when soil conditions are dry enough.

Pest and predator control

Check and replenish any rodent baits you may have out. Making sure no dogs, or hedgehogs can get to it by securing the bait within a bait station. Rats often drag the bait to a location they feel is safe.

If you had an ant problem in the past, start putting out ant baits in places sheltered from the rain, to stop a build up, that can occur within or adjacent to your buildings.

new zealand gardening calendar

This is a welcome sight in any garden!

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