From Jon Lamb Communications
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June 21, 2019
weed spraying

Glyphosate again confirmed as safe

Home gardeners can continue using herbicides containing glyphosate with safety – providing they follow label directions.
Australia’s pesticide regulator, the Australian Pesticides and Veterinary Medicines Authority (APVMA), has again confirmed that approved products containing glyphosate can continue to be used safely, according to label directions.
This statement follows recent landmark lawsuits in the United States, linking the use of glyphosate with cancer.
The AVPMA stated it was aware of recent international decisions concerning glyphosate.
As the national regulator for agricultural chemicals it continues to track and consider any new scientific information associated with their safety and effectiveness.
Following recent assessments, the APVMA found no grounds to place glyphosate under formal reconsideration again.
Glyphosate is one of the world’s most widely used and rigorously tested chemicals.
Australian stores have indicated they do not have plans to remove the weedkiller from their shelves.
More information on the APMVA web site »

   Pruning Pointers  

What's the pecking order for pruning fruit trees?

When it comes to pruning your deciduous fruit trees and vines, where do you start? 
Is there a priority list that says ‘prune me first or last’?
In reality, it doesn’t really matter – providing the task is completed while the trees are completely dormant. 
At the other end of winter, it’s worth remembering that grapevines and walnuts will bleed or exude sap if pruned once their roots have started their spring growth. 
This can be as early as mid August or 10-14 days before their buds begin to burst.
Personally, I like to prune grapevines (both fruiting and ornamental) first, as it is relatively easy to convert what looks like a visual disaster into a neat and tidy section of the garden.
Then work through the stone fruits and finish up with the pomes.

Simple guide for
pruning grape vines

  • Ornamental and all fruiting varieties except sultanas: Cut all new season canes back to the last big fat bud.
  • Sultanas: Leave six to eight big fat buds on each new season cane, then remove the remaining material.
Feature plant

Diamond Dazzler – a colour plant for all gardens

Diamond Dazzler (a Euphorbia hybrid) is one of those rare colour plants that are happy to flower all year round.
The flowers are pure white, fully double and literally smother the plant's canopy.
Diamond dazzler is also very compact (25 x 25 cm) making it very suitable for growing in all kinds of containers as well using as a feature or edging plant in the garden.
This is a very hardy, easy-care plant that thrives in full sun (also semi shade) and has excellent tolerance to drought. Shelter from heavy frosts.
Look for the Proven Winners label.

Diamond Dazzlers are available from leading garden centres.
More information »

Onions easy to grow but slow

Onions are a trouble-free crop well worth growing, providing there is no shortage of space.
By close planting (7 cm x 7 cm), it is possible to produce quite large numbers in a relatively small area. However, it is important that you plant the right varieties at the right time.
You can start planting early varieties of white onions late in autumn and follow these in June by Mild Red and White Spanish.
Plant main season (long storing) varieties, both white and brown from June through to September.
Onions are sun lovers but prefer cool, moist conditions until they are well established, then warm, drier conditions as they grow and mature.

Iron deficiency in plants – the bacteria connection

Plants require a wide range of minerals in order to grow and flourish, and one of these is iron.
From the perspective of a micronutrient, iron is required at a relatively high level.
This is in part because a number of plant enzymes require iron to function.
However, the largest requirement for iron is for the synthesis of chlorophyll, which is essential for photosynthesis . Photosynthesis is the ability of a plant to convert water, carbon dioxide and sunlight into glucose.
Surprisingly, iron is not actually part of the chlorophyll itself; instead chlorophyll requires magnesium, which is another essential micronutrient.
The inability to make chlorophyll is why an iron deficiency (otherwise known as chlorosis), shows up as sickly, yellow coloured leaves.

To learn how to overcome iron deficiency in your plants, click here to continue reading »

Seamungus and GOGO Juice are available at good garden centres and hardware stores.
Download more information:
GOGO Juice »
Seamungus »

Fruit trees – it's time to talk planting

Deciduous trees are ready to go into the ground right now. Being dormant they are in ‘sleeping mode’ and that makes it a great time to transplant them.
Planting can seem a bit complicated, but really it’s quite simple.
Dig a hole about twice the size of the root system, usually 50cm wide and 50cm deep. Then mix a large handful of organic fertiliser into the soil taken out of the hole.
If the soil is clayey (sticky) then also add at least 2 large handfuls of gypsum through the soil taken out of the hole.
If your trees come in sawdust, shake this off before planting and splay the roots out in the hole.
Because bare-root trees have been dug from the field, their roots have been reduced and the top of the trees should also be pruned (a subject for another day) – but essentially remove two thirds of the branching portion of the tree.
If you have a potted tree, still tease the roots out and splay them, but the tree will not need to be pruned.
Once you have placed the tree back in the hole, pack the soil back in around it and stamp it in firmly to get a good connection between the soil and the roots.  This will help the tree take up water.
Create a well to hold water, or add a water holding shield, then water in well.
Add a stake to help support dwarfing trees.
Then sit back and dream about all the fruit your tree will produce!

More information »

Premium locally grown stock from Balhannah Nurseries are available now.
Best time to plant bare-rooted trees is June to August. Look out for the green bag.
It's Balhannah Nurseries' guarantee of a premium fruit tree.

Soil boost for fruit trees in large containers  

There is little point plying established containerised fruit trees with fertiliser in winter, as the trees are either dormant or not making active growth.
On the other hand, a helping of organic material is just what is needed to stimulate the teeming hordes of micro-organisms that live in the soil or in this case, potting mix.
The organic matter can be well-made compost laced with quality chicken manure pellets.
This should be dug into the top two centimetres of potting mix only (deeper cultivation is likely to injure any tree roots close to the surface).
This organic mulch will break down slowly during the remainder of winter, leaving the potting mix in ideal condition to commence a new growing season.

Reducing fruit tree size 

When it comes to reducing the size of an overgrown fruit tree in the garden, hard pruning won’t solve the problem.
Removing more than 30% in one operation is sure to see the tree's branches return to their original size, as they will respond by producing very vigorous growth.
This strong vigour will continue until the tree has restored balance between its reduced canopy and its (original size) root system.
A better way is to reduce the canopy over a two or even three-year period.
However, it is essential not to remove more than 25% of the total canopy in any one operation.
You may also consider changing from winter to summer pruning – i.e. pruning soon after harvest.
Lawn Care – Stefan Palm
mushrooms in lawn

Suddenly – mushrooms and toadstools in the lawn

Take a close look at your lawn this weekend and don’t be surprised if you find rows or patches of small mushrooms or maybe toadstools.
Obviously they are not magic mushrooms – so why did they suddenly appear? More to the point will they damage your lawn?
South Australia’s turf advisor Stefan Palm is quite familiar with this scenario as it happens around the same time each year.
Needless to say, “Mushrooms and toadstools in the lawn” is the topic for Stefan’s lawn blog this week.
Stefan also has some good advice on controlling mushrooms in the lawn.

More information »
Paul Munns Instant Lawn

Try these top-performing winter veg

Small headed hybrid cabbage such as Superette should be top of the list, as seedlings planted now (40 cm apart) will be ready to harvest in 10-12 weeks.
Larger headed varieties, including Ball head, take a few weeks longer to mature and should be spaced 60cms apart.
Broccoli is just as easy to grow with Green Dragon, spaced 45-55cms apart, also maturing in 10-12 weeks.
Broccoli produces a single large green cabbage-like head, but once this is removed, the plant will produce side branches and numerous small heads.
Sustainable living tips

Growing food for a greener city

Ever wondered about how we can develop a truly sustainable local food system in SA? Last Thursday 45 people from across metropolitan local governments, state government and various businesses met to delve into our role(s) in regenerating the food system.
‘We are all part of a food system: ‘our farmers and fishers who draw on natural resources to produce food; our people and industries who transform, transport and sell food; and our families and communities, who grow, buy, cook and eat food.’ – Cardinia Shire Food Strategy
We gained insights from interstate and local food system champions. Stories were shared from the Cities of Melbourne, Darebin, Moreland, Greater Bendigo, Campbelltown, Charles Sturt, Onkaparinga and Salisbury. We gained a national snapshot of food system challenges and opportunities from Sustain’s Director Nick Rose.
If you missed out and would like access to the stories please subscribe to the SA Urban Food Network’s regular news here »
The network is supported by the Adelaide and Mount Lofty Ranges Natural Resources Management Board. #jointhemovement
Pictured above: Urban food system story tellers, Lee Tozzi, Nick Rose, Greg Jacobs, Sophie Kavoukis, Christy Spier, Mark Hannan, Janet Willoughby, Linda Enright, Gwyn Jolley, Bruce Naumann.
Keep cyclamen cool
Cyclamen  should now be in full flower – a performance that should last until spring if the plants are placed in the right position. These plants don't like it hot while inside, particularly air-conditioned heat. Select a cool, well lit, airy position such as a window sill or shaded veranda.

Soursobs starting to appear

Don't be in a hurry to spray soursobs. You will get better results if you wait until the plants have just started to flower. 
Then use one of the many systemic weedicides containing glyphosate.

Please keep your questions for Talkback Gardening

Good Gardening  is unable to answer individual reader's questions via email.
If you're looking for specific gardening advice please give me a call on ABC Radio Adelaide's Saturday morning Talkback Gardening  or speak to the experts at your local garden centre.
Sunday, June 23
Urrbrae Wetland Open Day
Cross Road, between Harrow Tce and Fullarton Rd. Illustrated talks, guided walks, self-guided visits and special children’s learning activities.  Gold coin entrance. 1.30 - 4 pm

Monthly plant sale, Friends of the Botanic Gardens of Adelaide
At the Growing Group Nursery, Mt. Lofty Botanic Garden (off Lampert Road, Piccadilly,  10.30 am - 2.30 pm.
A list of the plants available is on the Friends’ website »
Weekend gardening weather

Talkback Gardening tomorrow

ABC Radio Adelaide Talkback Gardening this Saturday – phone me and Deb Tribe on 1300 222 891 and have your own gardening question answered.

Guest Bret Draper, garden centre plant manager, Mitre10, Unley, and co-ordinator for the horticultural displays at the Royal Adelaide Show. 
Topic – Reliable colour plants for winter gardens and an exclusive preview of the horticultural displays planned for this year’s Royal Adelaide Show. 

Coming soon

Saturday & Sunday, July 6, 7
Orchid Club of South Australia's winter show
Enfield Community Centre, 540 Regency Road, Enfield. Orchid culture demonstrations 3 times daily. Plants and accessories for sale and expert advice from the growers. tea, coffee and food available. Entry $5.

Saturday & Sunday, August 10, 11
Annual Camellia Show, Camellias South Australia annual show
Carrick Hill, 46 Carrick Hill Drive, Springfield. Sat. 12noon - 4 pm; Sun. 10. am - 4 pm
Quality plants for sale. Free admission to the show & Carrick Hill grounds.

Saturday & Sunday, September 7, 8
Enfield Horticultural Society Spring Show
Klemzig Community Hall, 242 North East Road, Klemzig. 12 - 5 pm Sat, 10 am - 4 pm Sun. Admission $2. More information 8251 2299.

Saturday, September 21
Spring Garden Festival, Mount Pleasant
Stalls featuring quality plants, garden furniture, decor and garden-care products.
Showgrounds, Melrose Street. 8 am - 3 pm. $5 entry, concession $3, child under 15 free.
More information »

Saturday & Sunday, October 12, 13
Spring Expo – Native Flower Display & Plant Sale
Australian Plants Society (SA Region). Adelaide Showgrounds. Sat.10 am - 4 pm; Sun. 10 am - 3 pm.

Saturday & Sunday, October 19, 20
SA Geranium and Pelargonium Society spring show
Payneham Library complex, corner O.G. Road and Turner Street, Felixstow. Plant sales & display. Entry $3.

Burra Spring Garden Expo and Open Gardens
More information »

Saturday & Sunday, October 26, 27
Rose Society of SA Spring Rose Show – Roses are Red
Burnside Community Centre, corner of Portrush and Greenhill Roads Tusmore.
To be officially opened by the President of the World Federation of Rose Societies, Henrianne de Briey, 3 pm Saturday afternoon.
Competitive rose classes in Australian Championships and World Federation of Rose Societies classes, lectures, floral demonstration,trading tables - gifts, plants, rose growing information, including “Identify your rose”. Entry $5.
Full program here »

Sunday, November 10
Art and Roses at The Cedars
Heysen Road, Hahndorf. An exclusive one-day celebration of  spring in the garden of the renowned father and daughter artists Sir Hans and Nora Heysen. Featuring reproductions with real flowers of the artists' still life works, display of heritage roses, talks on art and blooms.
10 am - 6 pm. $15 (children under 15 free) Includes entry to the garden, house and studios.

Regular garden attractions

Adelaide Botanic Gardens – free guided walks
Friends of the Botanic Gardens of Adelaide guided walks for the public at Adelaide, Mount Lofty and Wittunga Botanic Gardens, and Botanic Park.
More information »

The Waite Arboretum, Fullarton Road, Urrbrae

Open free to the public every day of the year from dawn to dusk, except on fire ban days. Free guided walks on the first Sunday of every month, 11 am to 12.30 pm.
Meet at the West lawn (Croquet Lawn) of Urrbrae House. Bookings not necessary.
More information »

Urrbrae House historic precinct gardens
At the end of Walter Young Avenue, off Fullarton Road, Urrbrae, or from the Urrbrae House gate, Claremont Avenue, Netherby.
Open from dawn until dusk every day. Free entry.
More information »


Disclaimer: Although all reasonable care is taken in preparing information contained in this email, neither Jon Lamb Communications (JLC) nor its officers, staff or suppliers involved in the editing and production of this email accept any liability resulting from the interpretation or use of the information set out in this document. Information contained in this document is subject to change without notice and is of a general nature and should not take the place of professional personal advice. No responsibility is accepted by Jon Lamb Communications for the accuracy of information contained in web sites linked from this email. Publication of an advertisement does not constitute endorsement by JLC of any product or service, or warrant its suitability.

Copyright © 2019 Jon Lamb Communications, All rights reserved.

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