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Last week, visiting an area we had freed from honeysuckle and other weeds in 2019, we were delighted to see the first flowering of a male kawakawa.
We were surprised to see it mature so soon after we had planted it in 2020 as a 10 cm high seedling.
The same tree is pictured below, then 20-30cm high, in December 2020. Beside it are wild native Weeping grass, toatoa, and (behind, on the remnants of a harakeke shade fence) the common harmless weed “cleavers”.
Both in the wild and in our home garden, we love to see the Kawakawa flowers forming each year, the female trees promising to attract kereru once fruit have formed in early Summer.
We see two distinct forms in the flowers, because kawakawa is one of those trees that can be either male or female. Both produce long thin flower spikes – the tiny dots are flowers -but only the female produces fruit.
The flower spikes of male trees are longer, thinner and upright, like candlesticks. Below are male kawakawa in various stages of flowering:
In contrast, the flower spikes on female trees are shorter and stouter, and in Summer will gradually turn entirely orange to become a soft, juicy fruit enjoyed by blackbirds, thrushes, tui and kereru.
Below are female kawakawa trees with fruit in various stages of development:
kereru have already eaten the riper ends of some of these partially ripe fruit
This year we will try to remember to get a good photo of fully ripe fruit. Finding a whole fully ripe fruit in this tree can be difficult, since at least one kereru checks out the unripe crop each year, visiting frequently thereafter to nibble on a few unripe fruit. Once the fruit reach the partially-ripe stage pictured above, one or several kereru visit the tree many times a day, and spend a lot of time in it eating.
Like the fairytale Ugly Duckling, an invasive weed tree in a hedge will keep you busy, not with feeding but with endless pruning.
Whether you have a driveway border, ornamental garden or a patch of bush, you can reduce the costs of trimming and pruning by accurately identifying the “ugly duckling”. In the photos below, the ugly duckling is a tree privet in a regularly trimmed kohuhu hedge.
We controlled this tree privet for our client by our specially developed technique, which reduces the tree in a matter of minutes, and kills it over a year or so.
Repeat interventions to control the regrowth will take only a minute or two, perhaps once a month for a while, and then less frequently until the tree privet dies, probably within two years. Well before then, the dead trunk will be hidden among the foliage of the hedge.
Our technique kills tree privets up to at least 5m high without chemicals or felling. In our experience so far, it takes 1-4 years for the tree to be very obviously and completely dead.
In the fairytale, the Ugly Duckling grew up to be admired as the beautiful swan it was, but the tree privet becomes increasingly unwelcome as it pushes aside and overtops its plant neighbours. It can even outcompete forest trees in partial shade.
Young tree privet sapling at the roadside banktop of Kaipatiki Stream, (Glenfield), already dominating the understorey of mapou and karamu in a successful 25 year old dense native planting
We often see hedges or shrubberies in which one or several tree privets are being carefully pruned along with the hedge.
While hedge trees or shrubs look neat and become leafy after a trim, the tree privet gets a growth-stimulating trim instead of being eliminated, and is soon sticking out and above again.
Once the misfit is identified, it is usually cut down. But as with many woody weeds, cutting it off near the base creates a bigger problem, for the cut stem produces a dense mass of low branches around and below the cut. These low branches are often even more of a problem than the uncut tree, as they interfere with the surrounding plants, and stick out directly into paths, driveways and lawns.
Our technique was trialled successfully in 2018 in our Gahnia Grove project on the Glenfield Rd margin of Eskdale Reserve, and in 2019 on about 20 tree privets which had invaded the native tree planting along Kaipatiki Rd opposite Glenfield College.
Depending on the thoroughness of the first or follow-up interventions, it takes 1-3 years for the tree to die. Follow-up interventions only take a minute or so.
Save even more by removing tree privets as seedlings
Tree privet fruit are very popular with birds, and a tree privet seed dropped by a bird in a hedge or shrubbery usually grows up unnoticed for a year or two until suddenly it demands your attention by outgrowing the others.
Much time and expense can be saved by identifying and easily uprooting the tree privet seedlings found in gardens or Reserves visited by birds who have recently fed on tree privet fruit.
Older tree privet seedlings less than a metre high are often able to be uprooted easily when the ground is still wet from winter rain.
When uprooting is not immediately easy or would dislodge soil or disturb other plants, we partially break the stems to starve the roots. The whole plant can be easily uprooted some time later, if desired, or left to decay in place (eg in sensitive habitat or unstable slopes).
Large old tree privets already providing shade and erosion control
Tree privet grows very fast, up to at least 20 metres high, and can live for 100 years.
While it is well worthwhile removing seedling and juvenile tree privets where there is alternate vegetation, mature trees need to be assessed individually, as they are providing many functions.
Forked trunkthe two trunks
Above: A number of tree privets that grew up unnoticed in the last 20 years now form an important part of the forest canopy providing essential shade to Kaipatiki Stream
In or beside young native forest, an unrecognised tree privet will grow up to obscure and overtop all but the tallest trees. Once established, it may have become a vital part of the ecology of the site, contributing to water quality, soil conservation, the diet of birds and other fauna, and the health of surrounding vegetation.
Below: fruit on mature tree privets in native forest canopy
Below: tree privet about 10-15m high in native forest beside Kaipatiki Stream, Glenfield. Since native vegetation on the opposite (roadside) bank has not succeeded here due to grass, shrub and vine weeds combined with flooding by both piped and unpiped stormwater, this particular tree privet is one of several along this part of the stream forming the tree canopy, so in addition to feeding birds, this one is providing life-giving shade to protect water quality and freshwater ecology, including native freshwater fish and eels.
Just a reminder that Spring is underway as far as the plants are concerned, and weed vines and shrubs are putting out new shoots, sneaking around garden shrubs, drinking up the lovely water and increasing sun, and finding new ground to conquer.
Big weed invasions yield the most material for paths, mulch and compost, and the first big weeding produces a massive amount of plant material to be either sent to landfill or used to benefit the soil and plants by decomposition onsite.
Once the ground dries, sun comes out, and rain is infrequent, decomposition by rotting slows down or stops altogether.
We don’t encourage storing big piles of dry woody or papery material during the fire season, so if you have a lot of woody weeds to be dealt to….that is, vines, shrubs or trees…work needs to start very soon if you want the plant material composted onsite and returned to your soil to help the remaining plants grow well and remain weed free.
After we have done weed control and mulched where needed, the Spring rush of weeds doesn’t occur for most species, and not at all if we have had time to eradicate the weed before the warm weather.
Instead, the wanted plants grow luxuriously in the moisture and sunlight of Spring, filling the space and reducing weed reinvasion.
Since we only started our business last Christmas, we don’t yet have photos of our clients’ gardens in Spring after our weed control.
Below is a photo of an area of public Reserve in January this year, hand weeded of major environmental weeds, then gradually of benign leafy weeds. This area is part of a forest margin, in which density is key to keeping the area weed-free, so native regeneration has been allowed to fill the space entirely.
A native “Shaking brake” fern sporeling growing in Tradescantia
Almost every gardener knows Tradescantia ( Tradescantia fluminensis, aka Wandering Willie, etc). And many of them see it as a curse.
However, seedlings released from Tradescantia by careful handweeding usually include both natives and invasives, and they flourish in the humus created by decomposing Tradescantia.
The mahoe, toatoa, ti kouka, karamu and karo seedlings in the photos below are just a few of the thousands of native seedlings and sporelings we have found while handweeding Tradescantia in the Kaipatiki suburban area.
mahoe seedlings in Tradescantiakaramu seedlings in Tradescantiakaramu seedling in Tradescantiamahoe seedlings in Tradescantiatoatoa seedling in Tradescantiakaro seedling in Tradescantiatoatoa seedlings seedlings in Tradescantiamahoe seedling in Tradescantiamahoe? seedling in Tradescantiati kouka seedlings in Tradescantiakaramu seedling in Tradescantiakaramu and mahoe seedlingstoatoa seedlings in Tradescantiatoatoa seedlings in Tradescantiati kouka and karamu seedings in Tradescantiakaramu seedlingsin Tradescantiamahoe seedling in Tradescantiashaking brake fern sporelings in TradescantiaNative seedlings and sporelings found in Tradescantia
It is true that Tradescantia is relentless – though slow – in its growth, covering vast areas if unchecked, suppressing the natural regeneration of diverse native plants in wild habitats.
It is also true that it takes strategy and care to remove it completely and compost it to its extinction.
Above: Dense Tradescantia handgathered into piles for decomposition in place. Handweeding was begun furthest in the background, where the Tradescantia has been replaced by native regeneration 1-2 metres high.
Newly-piled Tradescantia around the cabbage tree is still green, while work has just begun on the area in the foreground.
Both before and after handweeding, Tradescantia’s leaves build up a loose humus-rich soil, and as a moisture-retaining ground cover it nurses seedlings and sporelings, which flourish if they are released to light at an appropriate time, and provided the soil is not allowed to dry out.
The humus and seedlings together provide for perfect regeneration of a native habitat if the Tradescantia is controlled methodically and carefully to its final eradication from an area, which can take a year or two as hidden stems emerge.
Below, June 2020: young toatoa (Haloragis erecta) seedlings, among the remnants and regrowth of Tradescantia after handweeding.
Many of these toatoa grew to a metre high here, helping revegetate a bank left bare by the removal of honeysuckle and dense Tradescantia.
Below, April 2021: The same bank, the toatoa on the right in foreground and midground. The young karamu, mahoe and ti kouka trees survived prolonged drought , sheltered and shaded by the shrubby toatoa that emerged spontaneously after handweeding of a major weed invasion which was followed by Tradescantia.
The image comparison below shows the same area during Tradescantia control in the foreground, as far as the tall ti kouka centre background. (The area beyond was left covered in Tradescantia for a few more years to avoid dessication and weed invasions more difficult to control, such as Creeping buttercup and Paspalum).
Drawing on our experience and photo records of handweeding for ecological restoration, we look forward to illustrating more examples as time permits.
In the meantime, you can see a description of our general methodology here.
Having been providing our chemical-free garden restoration services for 6 months now, we have been delighted to experience a range of outdoor environments, advised gardeners and non-gardeners alike on our unique methodology, and seen them enjoy the results.
Some have been short-term restorations, recovering a well-planned garden from just a few years of weed invasion.
Others are long-term projects, creating the conditions for the desired plants to succeed, and for easy weed control in the future.
If you are finding your garden hard to manage, through lack of time or difficult conditions, we offer a thorough site assessment in which we will listen to your needs and wishes, with identification of both weeds and any unrecognised free, wild and low maintenance plants… including hidden gems like the native tree seedlings, kahikatea and tanekaha, discovered this week and seen below:
Gardeners, nature watchers and ecological restorationists may like to join us in a guided tour of the ridgetop margin of Eskdale Forest, along the mown kikuyu edge of Eskdale Reserve where a white tape cordon marks the Gahnia Grove restoration project.
If you have a ready-made small group, we can schedule an hour to suit you, at a cost of $90 for the group.
Otherwise, email or message us your availability and interests, and we will see what can be organised.
From requests we have had so far, the focus for a tour could be
– efficient and effective control of environmental weeds without chemicals, especially kikuyu (beyond the mown area, which is controlled ny mowing)
– free wild native groundcovers and leafy shrubs
– how to recognise the free native tree seedlings which pop up in your garden or restoration site
Our website has some information and photos of all these, with more to come.
While shade is vital to the health of shade-loving plants and habitat, and can be life-saving in summer, there is no need to suffer the loss of light where unwanted weed masses have shut out the sun.
This is often the case with fast-growing trees like monkey apple, privet, tree privet and wattle, and vine weeds such as honeysuckle, pink jasmine, ivy and moth plant.
Where these weeds are among wanted trees and shrubs, the careful identification and removal of the weeds can open the area to gentle sunlight filtered through a leafy canopy, which will benefit from the winter light and fill out, so that no light has been lost by the time summer comes.
Where there is no wanted tall vegetation, removal of tall weeds will open the space to sun, so that a new, manageable ground cover or shrubbery can be established.
– assessment of your situation, with identification of weeds and also of any native plants, including native vines such as kaihua (NZ native “jasmine”), puawhananga (NZ native Clematis), kohia (NZ native passionfruit vine), karaeo (supplejack), tataramoa (Bush lawyer) – as these can be attractive, easily controllable additions to your natural areas, as well as food sources for kereru and tui in winter.
– advice or action on releasing your site from weeds and, if wanted, turning them into compost and mulch during winter, to keep soil moist in summer and help suppress future weed invasions.