S
Sabrina Hahn
Horticulturist and ABC Radio Perth gardening expert for 30+ years, co-host of Roots and Shoots podcast.
28
APPEARANCES
2
PODCASTS
024
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Sep 22, 2026
No green thumb? Everlastings are for you
J
0:21JoHOST
Take us on a little tour.
S
0:24Sabrina HahnGUEST
Well, I've had, I've created a Kimberley garden with red fines and a Queensland bottle tree that look, they look a bit like Boabs.
S
0:36Sabrina HahnGUEST
And then I've got this massive big log of wood that's come from an old Melaleuca and it looks exactly like a sea dragon.
S
0:45Sabrina HahnGUEST
So I've planted out all sorts of plants so it looks like coral underneath and And then when you walk into the front garden, I've absolutely chock-a-blocked it full of rare, unusual natives.
16 MINS LATER
J
16:57JeannieAUDIENCE
But I did hear you say something about a cake mix or something.
How to properly take care of the Macadamia tree
0:15

Christine LaytonHOST
You've got Christine Layton filling in for Jade and Amber and Sabby back from the Ravensthorpe Wildflower Show.
39 MINS LATER
P
39:47PeterAUDIENCE
yellow hue.
Impress your friends with homegrown avo on toast
S
18:56SharonAUDIENCE
No, it's not.
S
19:06Sabrina HahnGUEST
So just stick your finger in the pot and just see, um, how wet it is down there.
S
19:13Sabrina HahnGUEST
Now the other thing that happens with palms is the root system blocks up the drainage hole, so it means the water can't drain away, and I've had this with, um, q- quite a few of my plants.
S
19:28Sabrina HahnGUEST
So if you tip the pot upside down and see if you can see the hole, if you can see the root system, you need to get a drill.
S
23:32SarahAUDIENCE
No, in Bedford.
Sab's gone nuts! (and you can too)
N
19:28Natalie WillingtonAUDIENCE
Yes.
Waffle about wattle
J
20:30JoHOST
No, we might need to come back to you.
S
20:39Sabrina HahnGUEST
But if you go to the Corridors for Carnaby's website, start there, Corridors for Carnaby's website, then there's a program that's nuts.
S
20:51Sabrina HahnGUEST
for for cockies or nuts for cockatoos and that's the macadamia program you need to register and it will have all the information on when and where to pick up the macadamias um so uh So you've got a link in there and you have to go to that and then they will give you all the directions on how to log in and register to get some of these macadamias.
L
22:04LynneAUDIENCE
Is there anything else I can do to maybe lessen
Roots and Shoots
C
18:57ChristineHOST
Hello, Joan.
S
19:03Sabrina HahnGUEST
One flowers beautifully- Yep ... and the other, I haven't had a flower on in two years.
24 MINS LATER
A
42:45AidenAUDIENCE
How, what can I do to help it?
Excess bananas? They’re good for more than just cakes
C
1:11CamAUDIENCE
I'd say, yeah.
S
1:25Sabrina HahnGUEST
So in a wind, they, they sort of, the, the root system will move a bit and then the water gets down there and they, they tend to rot.
S
1:35Sabrina HahnGUEST
So if you're planting any more woolly bushes, then I always suggest that you get some of the anti-rot spray and spray on them quite early.
16 MINS LATER
J
17:24JohnAUDIENCE
Years, they're even growing in the grass now.
Naughty gardening with chilli willy seeds and nipple cherry tomatoes
S
6:02SteveHOST
... and it is just sitting in bags at the moment."
S
6:19Sabrina HahnGUEST
I'd throw in a bit of, uh, biochar and, uh, some poo, whether it's cow poo, sheep poo, chicken poo, um, because you're growing veggies.
30 MINS LATER
S
36:39SteveHOST
Mm
Golden Gumnuts and the Suspicious Earwax Substance
A
3:36AmberHOST
A little bit of good news.
S
3:39Sabrina HahnGUEST
So, um, scientists agree that this is the sixth mass extinction on the planet, and unfortunately, Western Australia has the worst record of conserving species that are critically endangered and under threat.
S
3:56Sabrina HahnGUEST
So basically what's happened, for the past 30 years, uh, the government hasn't, all the governments over the last 30 years have failed to protect the environment and conservation.
S
4:10Sabrina HahnGUEST
So what the scientists are saying is we need urgent action and political courage to actually put through environmental protection laws.
S
4:22Sabrina HahnGUEST
Now, some of the good stories are that the critically endangered numbat, they have now been breeding them in isolated areas and are releasing them in areas where they control the feral animals, 'cause feral an- animals are a massive, massive, massive problem.
S
4:44Sabrina HahnGUEST
So we know that we can now, hopefully, breed animals that are on the edge of extinction, but we need the habitat to be able to put them back in, 'cause what's happening is we're getting these isolated little pockets of forest or, or environment that suits those species, but they're all fragmented.
30 MINS LATER
S
35:27speaker_11AUDIENCE
Um-
How to keep your wife happy and relocate kangaroo paws
A
15:54AllyAUDIENCE
And I don't know what to look for.
S
15:56Sabrina HahnGUEST
So Ally, dieback is, it's called Phytophthora cinnamomi, and it is a water mold, and it travels through the ground, and it attacks the root system of plants.
7 MINS LATER
J
23:21JoHOST
She needs to know how to prepare and to get it to grow and produce for her.
Flowers for OIdies: Why we need good gardens in our aged care homes
S
14:23speaker_8UNKNOWN
... one of those is dead.
S
14:27Sabrina HahnGUEST
So, um, so Jude, apples are notoriously slow, and that's why people espalier apple and pear trees, because they're slow-growing.
S
14:38Sabrina HahnGUEST
The trees that come in bare-rooted come from Victoria usually, so it takes a little while for the trees to acclimatize to the Perth climate.
S
14:50Sabrina HahnGUEST
I wouldn't worry too much about it, but the, but the stem that's died back, I want you to prune that off.
S
15:01Sabrina HahnGUEST
I'd put compost on there and give them soil drenches that have got humic and fulvic acid and minerals in them, and you can apply that every month from spring onwards, and that should definitely help with flowering and fruiting.
A
18:22AmberHOST
Mm-hmm.
Replacing lawn with native plants
J
6:33JoHOST
... not the microbats.
S
6:38Sabrina HahnGUEST
Anyway, things like basil, mint, the, you know, the, um, pelargoniums, we call them geraniums, they're actually pelargonium, with the scented leaves.
S
6:51Sabrina HahnGUEST
So all those sorts of things, basil in particular actually, is really good as a mosquito repellent.
14 MINS LATER
J
20:31JoHOST
[laughs]
The gall of the gall wasps
A
4:12AmberHOST
We still have
S
4:16Sabrina HahnGUEST
Um, what happened was, unless the wood chips are, um, taken down to, uh, two, less than 2.5 millimeters, and, centimeters rather, and heat treated, then there is a problem where perhaps the polyphagous shothole borer just goes through and comes out the other side unharmed.
S
4:44Sabrina HahnGUEST
The other thing about wood-based mulch is we have Phytophthora, we have Armillaria.
S
4:51Sabrina HahnGUEST
If the wood is heat treated, the mulch, it is fine to use because it kills all those pathogens.
S
5:00Sabrina HahnGUEST
If you are going to use wood-based mulched, bleh, wood-based mulch, find out where it comes from.
11 MINS LATER
A
15:52AmberHOST
Oh.
My oh my, what a mandarin tree
J
7:34JohnAUDIENCE
What do I do?
S
7:38Sabrina HahnGUEST
You can get fruit fly netting, John, but mandarin trees tend to be fairly wide, um, and it can be hard to net them.
S
7:54Sabrina HahnGUEST
We only notice them when we have fruit, but they're actually there all year round.
9 MINS LATER
What type of soil is best for your liquidambar
J
14:05JoHOST
What do we do with them?
S
14:24Sabrina HahnGUEST
When they get bigger, you're better off putting them near a wattle tree, 'cause they make really good partners for quandongs.
J
15:56JoHOST
Wants to know if you can grow pistachios in Perth, and is it hard to do?
Easy ways to make your garden bandicoot-friendly
A
1:24AmberHOST
That's the one, yeah
S
1:29Sabrina HahnGUEST
So, a, a lot of us are going, "All our beautiful mammals, all our beautiful birds..." Now, what I want to...
S
1:36Sabrina HahnGUEST
b- I want people to know that there is stuff that we can do as individuals, okay? So I know there's all sorts of things happening in the world, and we seem to have the rise of the Fourth Reich with world leaders, but there is something that we can do.
S
1:53Sabrina HahnGUEST
So the Corridors for Carnabys was launched last Wednesday, and it is such a fantastic opportunity for all of us to do something to save a species from extinction.
A
2:54AmberHOST
Imploring?
Western Australia Country Hour
19:52
S
18:04Sabrina HahnGUEST
there? Well, particularly after World War I and World War II, when there was food shortage, but also supply of things like fertilisers, we're experiencing that today.
S
18:19Sabrina HahnGUEST
Some of the market gardens that were grown to sort of feed a nation, they noticed that in areas in the market gardens where they left the old root system, so rather than pull the entire plant out, they would just cut the produce off, say the broccoli or the cabbage, but leave the old root system there and they would plant the seedling next to where the root was still in the ground.
S
18:52Sabrina HahnGUEST
They didn't get as many insects and they certainly didn't get anywhere near the amount of disease that a lot of them got.
S
18:59Sabrina HahnGUEST
So then they started experimenting with different zones and different plots and it was repeated again and again.
S
19:08Sabrina HahnGUEST
And the seedlings that grew next to the old rootstock that was left in the ground fared much better and gave them better yield.

Richard HudsonCORRESPONDENT
Are there any other ways that you can look after and promote the microbes, though, from your experience?
Make your bamboo work for you
J
2:26JoHOST
I'm not sure if you can see that.
S
2:28Sabrina HahnGUEST
So what I'm looking at, for people that can't see the picture, is, um, five sticks, uh, that are leafless, but they've got fantastic big fat buds on them, and that's what you want.
S
2:42Sabrina HahnGUEST
When you prune a hydrangea, you want to get rid of all the old leaves, 'cause they often get powdery mildew.
10 MINS LATER
J
13:35JoHOST
White sapote.
Banksias, figs, sweet potatoes and more
A
17:43AmberHOST
What is that?
S
18:00Sabrina HahnGUEST
Um, but they will definitely hook into hakea nuts, and they're very difficult.
20 MINS LATER
M
38:33MelissaAUDIENCE
And I'm just wondering what I might be lacking in the garden to, to really strengthen them up a bit.
Hibiscus, coriander, pittosporum and more
A
44:45AmberHOST
[gasps] Begonia hardcore.
S
44:51Sabrina HahnGUEST
Now, I have to tell you that, like the tropics, they don't like the cold weather.
S
44:56Sabrina HahnGUEST
So in winter, it's going to die down to nothing, right? So you need to replant the entire pot.
S
47:48speaker_14UNKNOWN
... of the salt.
Gardening after a storm
J
4:54JoHOST
I think they wanna save it.
S
5:11Sabrina HahnGUEST
Well, in order to have a 50% chance of that beautiful Xanthorrhoea belgica surviving transplant, you would need a crane, and you would also need a mini excavator.
22 MINS LATER
H
27:51HerbAUDIENCE
... should I just simply drop the, uh, the w- uh, the water in the reservoir of the wicking bed and see what happens? Or, uh, what else would I need to do? Um-
Passionfruit flowers but no fruit
A
30:18AmberHOST
Alan sent some pics through
S
30:19Sabrina HahnGUEST
He sent some pictures of a beautiful heuchera lerena, the pink cushion heuchera, in full flower.
S
30:27Sabrina HahnGUEST
Um, and he's concerned that it's got a little bit unruly, and should he prune it? Now, Alan, yes, you should.
S
30:35Sabrina HahnGUEST
What happens with heuchera lerena, or the pink cushion heuchera, is there's two forms.
S
30:45Sabrina HahnGUEST
So the problem with the heuchera lerena, the weeping form in particular, it gets really, really heavy with flower, and if you have major storms coming through, because it gets very top-heavy, they have a tendency to be ripped out of the ground.
11 MINS LATER
R
41:36RobAUDIENCE
if it's a nutrient thing or what we need to do.
Native potting mix offers several benefits
I
12:34IanAUDIENCE
[laughs]
S
12:34Sabrina HahnGUEST
So I found a research paper that is now looking into, and this is happening all across Australia, on why passionfruit vines are flowering, but not fruiting.
S
12:46Sabrina HahnGUEST
And what the theory is that the, the Panama passionfruit, the black and the Nelly Kelly passionfruit were developed many, many years ago, and genetically they are getting weaker.
L
17:57LaraAUDIENCE
Okay.
S
18:04Sabrina HahnGUEST
You need to take the cutting just below a n- a node where the, where the, um, where the leaf comes off.
Stabby Sabby: Licence to Prune
S
18:57Sabrina HahnGUEST
so I mean, they've put the energy into the only two fruit they've formed, but it's not bad.
S
19:02Sabrina HahnGUEST
Um, okay, so it's normal for their leaves to go yellow because they are now going into dormancy, and you have to fertilize that tree in spring.
S
19:20Sabrina HahnGUEST
The big fertilizing regime for pomegranates is when they start shooting, where you see the buds are forming at the beginning or mid-spring.
17 MINS LATER
All about deadheading spent flowers
S
5:48Sabrina HahnGUEST
Uh, 'cause it won't work, 'cause that particular viburnum, and mine gets it every year, they get absolutely hammered by spider mite, and it causes that browning on the tips and the speckled leaf.
S
6:08Sabrina HahnGUEST
One of them can be the, too much calcium uptake, or if you've got a bore and the calcium builds up on the leaf, they definitely get, uh, spider mite really badly.
S
6:26Sabrina HahnGUEST
Now, you can use wettable sulfur to treat the spider mite, uh, and hard pruning.
7 MINS LATER
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