From Jon Lamb Communications
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August 23, 2019

Quick action needed to fight citrus gall wasp

Time is rapidly running out if you intend to remove citrus gall wasp galls by pruning.
The wasps only have one generation in a year and right now the entire population of juvenile wasps are inside one of those galls.
If you remove all of the galls by the end of winter, before the adults emerge as wasps, the entire population in your garden will be eliminated.

Prunings must be removed

Prunings containing galls should be removed and microwaved, mulched or consigned to the green waste bin.
Latest gall wasp research indicates the juveniles can still emerge from galls left on the ground four weeks and more after pruning.
Good Gardening will feature alternative methods of controlling citrus gall wasp through early spring.

Next week: News of a new garden product that has reduced citrus gall wasp populations by 95% in recent citrus industry research trials.
Feature plant

Stunning newcomer makes an entrance

Red Baron, one of the recently released argyranthemums, was an eyecatcher at this week’s Nursery Industry Trade Day.
More details in our Good Gardening newsletter during September.

To prune or not to prune?

If you haven’t completed your deciduous fruit tree pruning program and the buds are starting to burst, don’t panic.
Wait until the petals fall and new growth has started. 
At that stage, prune more lightly than normal and add a little extra fertiliser to make up for the tree energy lost through late pruning.

Last call for winter cuttings

Waste no time if you would like to grow new plants from materials left after pruning deciduous trees and shrubs.
Your cuttings should include at least two and possibly three buds or nodes.
These will strike readily in a pot containing coarse, washed sand.
The list of plants that make good cuttings includes roses, fuchsias, hydrangeas, abelias, abutilon, plums, vines and wisteria.

Chrysanthemum cuttings

It’s also time to take cuttings or slips from what is left of last season’s plants.  
Slips grown from root cuttings strike readily and produce the best plants.
However, they can also be grown by simply breaking last year’s clumps into small pieces.
More on growing perennial plants from small pieces in  my Advertiser gardening column, tomorrow.

Open Gardens back for spring from next weekend

Open Gardens SAOpen Gardens SA's spring season starts with the first opening on the weekend of Saturday, August 31 and Sunday, September 1.
Beautiful bulbs will be on display at 'Avondale', Rhynie (near Riverton). 
Avondale opens again on Saturday, October 5 to Monday, October 7, looking different from four weeks earlier, and showcasing a second stunning display of ever-changing spring bulbs. 
This season will be the 20th year – and 23rd time – that Avondale has opened and shared the arrival of spring with thousands of visitors, while also generously donating all funds raised to a range of charities.

The full season's Open Gardens SA calendar is here »
Lawn Care – Stefan Palm
Lawn coring

Lawns respond well to coring

When it comes to managing the lawn, most gardeners know the benefits of regular mowing and fertilising.
But what about coring?
If you’re not too sure what coring is about, you’re not alone.
As Stefan Palm explains, the benefits of coring your lawn are considerable.

You will find more information on the advantages of coring your lawn and the benefits of carrying out this practice early in spring, here »
Paul Munns Instant Lawn

Quick late-winter colour

It’s nearly the end of winter and sadly, in far too many gardens there is hardly a flower to be seen.
For a quick splash of easy-care colour check out the current range of winter flowering bloomers at your local garden centre.
Bloomers are available in individual 8 to 10 cm containers or in multiple packs of six or 10.
Either way, they are best re-positioned into larger individual pots or multi-planted into a hanging basket or display box.

Three favourites

Primulas – Masses of small flowers on long, thin stems. Mainly in pinks mauves and orange as well as white.
Polyanthus – Numerous small daisy-like flowers in small clusters. Huge colour range including blues, yellows, mauves, orange and white.
Cineraria – Large clusters of daisy-like flowers in blues pinks, orange and white.

Pick-me-up for container plants

Late winter is a great time to prepare your container plants for the growing season ahead.
Start by soaking the root ball with Seasol or worm juice solution.
This will activate the soil biota. Then mulch the topsoil with a thin (2 to 3 cm) layer of aged cow manure or chicken manure pellets, blended with quality compost or soil improver (50/50).
Over the next few weeks rain and watering will defuse this material into the root ball, restoring health to the potting mix.

Beer attracts slugs and snails           

Because slugs and snails are attracted to the smell of beer, they are easily trapped.
Position a straight sided container half filled with beer so that 2 cm remains above ground level.
This will prevent beetles, spiders and other predatory insects from falling into the brew.  However, to be effective you need to remove drowned snails and top up the beer regularly.

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, August 25
Plant  sale, Friends of Botanic Gardens of Adelaide growing group nursery
Enter via trades entrance off Lampert Road, Piccadilly, 10.30 am – 2.30 pm. 
A list of plants available here »
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 – Haidi Sutherland
Topic – House Plants: end of winter revival and early spring recovery.

Coming soon

Friday, August 30 to Sunday, September 8
Royal Adelaide Show.

Friday, September 6

Rhododendron Society’s Grant Memorial Lecture
International award-winning landscape architect and media personalityJim Fogarty. Coventry Library, 63 Mount Barker Road, Stirling, 6.30 pm. $20, including wine and cheese. Contact for more details »

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,  September 21 & 22
Orchid Club of South Australia Spring Show
Enfield Community Centre , 540 Regency Road, Enfield. 10 am to 4 pm each day. Pies, pasties, Devonshire teas. Trading table, plants and accessories, cultural demonstrations and raffle. Expert advice from friendly, experienced growers. Entry only $5.

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, October 19
Begonia and Fern Spring Show
Klemzig Community Hall, 242 North East Rd, Klemzig (enter from Wellington St). $2 admission. Morning and afternoon tea.

SA Chrysanthemum Society annual plant sale
10 Lucknow St, Marleston SA, 10 am to 2pm.

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,  October 26
SA Chrysanthemum Society annual plant sale, second day
10 Sutherland Place, Golden Grove, SA, 11am to 2pm

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 »

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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.

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