Uncategorised
English Ivy (Hedera helix)
- Details
Whilst English ivy (Hedera helix) provides some lovely features and screens in our gardens this is very aggressive when out of control.
The Dandenong Ranges in Victoria (see video) are similar to Mt Wilson/Mt Irvine with the basalt soil and ornamental gardens and have a similar problem to the mounts with Ivy growing up trees and sometimes enveloping the whole tree.
Ivy is rampant in the village and eradication is difficult. However, we can all do something to limit the spread of ivy. Ivy flowers and produces fruit when it climbs up a tree and the seeds are then carried into gardens and the bush by birds. English ivy will eventually choke and kill trees, even big ones, both natives and exotics. To stop it spreading we need to focus on ivy growing on trees.
Tree Fern Treatment
For tree ferns the task is more complex as the ivy roots grow into the trunk. To kill the ivy the stems must be scraped with a knife and the herbicide applied to the ivy stem wound, being careful to avoid the tree fern trunk. This is best done in the growing season October to end April.
Non Tree Fern Tree Treatment
For other trees the process is much easier. Just cut the Ivy at the base and the Ivy should die. It is best also clearing about 1 m from the base of the tree. (see video)
Herbicide
Glyphosate (Roundup) is a herbicide that is used for killing English Ivy. Please note special care must be taken when using Glyphosate. The MWPA accepts no responsibility for the use or application of any chemicals. Always check the labels and Safety Data Sheets for all chemicals and use only as directed.
Please note that the Blue Mountains Basalt Forest in around Mt Wilson is a ‘Blue Mountains Sensitive Vegetation Community’ so extreme care needs to be taken when controlling weeds in bushland areas. The only weed control methods recommended in sensitive areas are ‘scrape and paint’, ‘cut and paint’ and ‘stem injection’. If in any doubt about how to control weeds on your property consider using an accredited weed control contractor.
Other Usefull references:
Weedwise Weed of the Month - English Ivy
Weedwise - English Ivy - Best Practices
WikiHow - How to kill English Ivy
Stinking Iris (Iris foetidissima)
- Details
Flowering from November on The Mounts is Iris foetidissima also known as “Stinking Iris” or “Roast Beef Plant” after its rather unpleasant fragrance when cut or bruised.
It is a clump-forming evergreen herb to 100 cm, with tough rhizomes immediately below the soil surface.
The flowers are 5–7 cm in diameter and are dull purplish-grey tinged with yellow. More common in Australia is the yellow flowered variant that is often naturalised. You will find both varieties flowering in Mt Wilson currently.
At maturity each seed capsule splits into three, each with two rows of round orange seeds of 5 mm diameter, these can persist for several months.
Despite the Royal Horticultural Society giving Iris foetidissima their prestigious Award of Garden Merit. The plant is clearly becoming a problem in Mt Wilson, most notably in and around Church Lane. Each plant grows rapidly and seeds readily and is dispersed by birds. Mature stands will easily smother a garden bed and become extremely difficult to remove.
There are three options to manage this plant:
- If you wish to retain any plants, systematically remove any seed capsules before the seeds emerge.
- To remove the plants, the most effective way is to mattock out the rhizomes (juvenile plants can usually be removed by hand.
- Iris foetidissima will respond to Glyphosate (RoundupTM) but the leaves will need to be soaked and secondary spraying may be required.
2021 Newsletters
- Details
February 2021
pdf Under and Overcliff at Wentworth Falls February 2021 (443 KB)
March 2021
pdf Ikara Ridge and Ikara Head at Mt Victoria March 2021 (431 KB)
April 2021
pdf Hat Hill to Anvil Rock at Blackheath April 2021 (413 KB)
May 2021
pdf Transit of Venus Track at Woodford May 2021 (428 KB)
June 2021
pdf Asgard Swamp and Thor Head at Mt Victoria June 2021 (426 KB)
July 2021
pdf Cancelled Leura Lookouts Walk July 2021 (441 KB)
August 2021
pdf Cancelled Leura Lookouts Walk August 2021 (427 KB)
September 2021
pdf Cancelled Leura Lookouts Walk September 2021 (429 KB)
October 2021
pdf Cancelled Leura Lookouts Walk October 2021 (434 KB)
November 2021
pdf Jinki Ridge near Mt Wilson November 2021 (432 KB)
December 2021
pdf Waterfalls, Logging Trails, The Mill and Daintree Lane at Mt Wilson December 2021 (443 KB)