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The Grow Guys Gardening supplies and hydroponic specialists

13/10/2026

A new pH probe isn't ready out of the box. It needs 24 hours soaking in KCl and a fresh calibration, and most people skip both. Here's the whole swap, start to finish.

The swap: pen off, storage cap off, unscrew the collar, pull the old probe. That's the part that's died, not the pen. Seat the new ProbePlus (there's an arrow so it only goes one way), screw the collar down firm, cap on. Under a minute, no tools.

The bit everyone skips: the new probe goes into KCl storage solution for 24 hours before it touches a reservoir. That rehydrates the glass bulb so it can be calibrated. Never RO, distilled or deionised water. Pure water wrecks the probe.

Next day: calibrate. Fresh 7.0 first, then 4.0. Now it's stable and ready to trust.

Bluelab's tip, and it's a good one: keep a spare probe on the shelf and start soaking it the day before you plan to swap. No downtime mid-crop.

pH ProbePlus: https://www.thegrowguys.com.au/products/bluelab-ph-probeplus
KCl storage solution: https://www.thegrowguys.com.au/products/bluelab-kcl-storage-solution

Comment if you've ever calibrated a bone-dry probe and wondered why the number wouldn't settle.

Last day of Grow Day. The shop's shut today but the website isn't: 10% off everything that isn't already on sale, until ...
11/10/2026

Last day of Grow Day. The shop's shut today but the website isn't: 10% off everything that isn't already on sale, until midnight tonight. No code needed.

https://www.thegrowguys.com.au

10/10/2026

Every pest problem you've ever had was visible two weeks before you saw it.

A customer rang me last month with a spider mite problem. Full-blown, webbing on the tops. I asked how long it had been going on. "Noticed it Tuesday."

It hadn't started Tuesday. It had been under the bottom leaves for three weeks. Every infestation I've ever seen was visible well before anyone saw it. You just have to look in the right three spots.

Under a low, old leaf. Flip it. Stippling looks like tiny pale dots on the top side. Webbing underneath means you're already late.

The stem. Run a finger up it. Sticky residue, deformed new growth, curled leaf edges.

The sticky trap. It shows you what's flying around before anything lands on a leaf.

Sixty seconds, once a week, same day as your reservoir change. Leaf, stem, trap. If you do that and nothing else, you'll catch every outbreak while it's still a five-dollar problem.

Yellow sticky traps: https://www.thegrowguys.com.au/products/bugs-for-bugs-yellow-sticky-trap

Comment what you found last time you looked under your leaves.

Ranunculus, Iceland poppies and a few daisies. One spring bunch, one blue wall, Jess holding it.We sell the gear for gro...
09/10/2026

Ranunculus, Iceland poppies and a few daisies. One spring bunch, one blue wall, Jess holding it.

We sell the gear for growing indoors. This is what the same coco, the same nutrients and the same weekly routine do once the weather turns. Nothing exotic, just the fundamentals done every week.

Swipe to the end. Come and say hello in Invermay.

We're open 9 till 3 today and Grow Day is on. 10% off everything that isn't already on sale, and it comes off at the cou...
09/10/2026

We're open 9 till 3 today and Grow Day is on. 10% off everything that isn't already on sale, and it comes off at the counter. No code needed.

Come in and see the lights running: Unit 10/110 Gleadow St, Invermay.

Can't make it in? Same deal online until midnight Sunday: https://www.thegrowguys.com.au

Three days left of Grow Day. If it's full price, it's 10% off. No code needed, in store and online.New light, fresh carb...
09/10/2026

Three days left of Grow Day. If it's full price, it's 10% off. No code needed, in store and online.

New light, fresh carbon filter, nutrient restock, second tent. Whatever's been sitting on the list.

In store until 3pm Saturday at Unit 10/110 Gleadow St, Invermay.
Online until midnight Sunday: https://www.thegrowguys.com.au

Ranunculus, up close, colour and black and white.Ranunculus start as dry claw-shaped corms pre-sprouted in autumn: soake...
08/10/2026

Ranunculus, up close, colour and black and white.

Ranunculus start as dry claw-shaped corms pre-sprouted in autumn: soaked, sprouted in trays under lights, then planted out. About six days from a dry claw to roots and shoots when you get the moisture right.

Swipe for the full bloom, the one still closed, and the same flower with the colour pulled out so you can see the structure. Layers on layers.

If you want to try them next season, the pre-sprouting trays, coco and heat mats are all in store.

Grow Day is on. 10% off everything that isn't already on sale, in store and online.No code needed. It comes off by itsel...
08/10/2026

Grow Day is on. 10% off everything that isn't already on sale, in store and online.

No code needed. It comes off by itself at the counter and at the checkout.

Been putting off a light upgrade, a bigger tent or a nutrient restock? This is the weekend to do it.

In store: Unit 10/110 Gleadow St, Invermay, until 3pm Saturday.
Online: https://www.thegrowguys.com.au until midnight Sunday.

07/10/2026

By the time you can see mites, you're three weeks late.

The people who ring me about mites have one thing in common. They bought the spray after they saw the mites. By then they're three weeks late, because by the time you can see them they've been breeding under the leaves for a month.

The program that actually works is boring:

A weekly preventative foliar while the plants are in veg. Full coverage, undersides especially. That's where everything lives.

Lights off or dimmed while you spray, never under full light.

And fix the environment. A wet, stagnant room breeds the exact thing you're spraying for. Sort the airflow and the humidity or you're mopping the floor with the tap running.

The maths: prevention costs about a bottle a run. Losing a run costs everything in it. The nutrients, the power, the months. You'll see commercial rooms running this program because they've done that sum.

The spray does the hard work. The glue trap tells you the program's working.

What we run for ornamentals: Broad Blue Protect, a systemic spray with about eight weeks of cover per application, as a ready-to-use bottle or a concentrate that makes ten litres. Growing edibles? Ask us and we'll point you at the right product.

Broad Blue Protect RTU: https://www.thegrowguys.com.au/products/broad-blue-protect-rtu-750ml
Broad Blue Protect Concentrate: https://www.thegrowguys.com.au/products/broad-blue-protect-concentrate-250ml

Tell me the pest that keeps coming back and I'll tell you where it's getting in.

06/10/2026

We've started selling bags. Not just any bag. Bricks of mushrooms in bags, and they're the easiest CO2 you'll ever run in a tent.

Here's why it matters. There's a love triangle in every grow room: lighting, nutrients and CO2. If you're pushing your lights hard and your nutrients hard, the thing holding you back is the third one, and it's always CO2. Plants build themselves out of it and a sealed tent runs out quickly.

A bottled CO2 setup with a regulator and controller is the right tool for a commercial room and costs a great deal more. For a tent, a mushroom grow bag does the job: the mycelium breathes out CO2 as it grows.

The install: don't slide the end out. Roll the top over, thread the hanger through, hang it above the canopy. I'd run two in a 1.5 by 1.5 metre tent.

The side benefit people miss: once CO2 isn't coming from fresh air, your exhaust fan doesn't have to run flat out replacing it. You can set it purely for temperature.

XL CO2 Grow Bag by Aussie Mushroom, $49.50 with the hanger: https://www.thegrowguys.com.au/products/xl-co-grow-bag-by-aussie-mushroom

Comment your tent size and I'll tell you how many you need.

Address

Unit 10/110 Gleadow Street
Launceston, TAS
7248

Opening Hours

Monday 8:30am - 5:30pm
Tuesday 8:30am - 5:30pm
Wednesday 8:30am - 5:30pm
Thursday 8:30am - 5:30pm
Friday 8:30am - 5:30pm
Saturday 9am - 3pm

Telephone

+61481735126

Website

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