Optimum Bloom
Optimum Bloom is dedicated to the flowering and fruiting stage of plant growth.
Hydroponic Nutrient.
Stories, knowledge & advice from growth loving humans.
Nora Mutalima: The Leca Queen
Nora Mutalima shares her journey from soil to semi-hydroponics, how Growth Technology products fuel her thriving indoor jungle, and why leca changed everything.
Monstera Deliciosa
Monstera deliciosa
Tropical climber with big split leaves that suit modern interiors. Give it a moss pole, bright indirect light and warm humid air.
Garden Gurus: Growth Technology
Growth Technology on Australia's Garden Gurus program.
Beyond NPK: What Nutrient Labels Don't Tell You
NPK measures three nutrients. Your plant depends on twelve.
Plant Hub Categories
Plant Hub Categories
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Grower Profile
Read the stories of different growers in our community.
Nora Mutalima: The Leca Queen
Nora Mutalima shares her journey from soil to semi-hydroponics, how Growth Technology products fuel her thriving indoor jungle, and why leca changed everything.
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Featured Articles
Garden Gurus: Growth Technology
Growth Technology on Australia's Garden Gurus program.
Beyond NPK: What Nutrient Labels Don't Tell You
NPK measures three nutrients. Your plant depends on twelve.
Your Plants Haven’t Stopped. They’re Resting.
Slower growth in winter isn’t a problem to solve. It’s a rhythm to understand.
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Educational Videos
Explore our library of videos.
GT on Garden Gurus: Feeding Indoor Plants
GT Rootzone: Kelp-Based Support for Healthy Roots
Plant Nutrients and Fertilisers: Understanding the Difference
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Plant Profiles
Growing tips, environment information and nutrient recommendations for popular plants.
Featured Plants
Monstera Deliciosa
Monstera deliciosa
Tropical climber with big split leaves that suit modern interiors. Give it a moss pole, bright indirect light and warm humid air.
Golden Barrel Cactus
Echinocactus grusonii
Indoors
Full Sun
Easy
Spherical cactus with golden spines and deep ribs. Slow-growing and long-lived, it suits pots in a sunny spot or a dry garden bed.
African Violet
Saintpaulia
Indoors
Indirect Light
Moderate
Compact windowsill plant with velvety leaves and flowers that keep coming. Bottom water and steady warmth keep it in bloom all year.
Fiddle Leaf Fig
Ficus lyrata
Indoors
Indirect Light
Moderate
Indoor tree with large violin-shaped leaves that make a statement. Stable warmth, bright light and a fixed spot keep it happy.
Aloe Vera
Aloe vera
Indoors
Full Sun
Easy
Succulent with thick gel-filled leaves prized for skin care. Thrives in a sunny pot with sparse water and a free-draining mix.
Tomato
Solanum lycopersicum
Outdoors
Full Sun
Moderate
The home garden staple, with countless varieties for salads, sauces and snacking. Fruits through summer with sun, water and feeding.
Golden Barrel Cactus
Echinocactus grusonii
Spherical cactus with golden spines and deep ribs. Slow-growing and long-lived, it suits pots in a sunny spot or a dry garden bed.
Kangaroo Paw
Anigozanthos
Western Australian native with velvety paw-shaped flowers that draw birds. Drought tolerant once settled and superb as a cut flower.
Jalapeño
Capsicum annuum Jalapeño
Medium-hot chilli that fruits heavily through summer. Pick green for crunch or let pods ripen red for sweeter heat.
Lemon
Citrus limon
Evergreen citrus with fragrant spring blossom and tart yellow fruit. Glossy foliage year-round; grows well in a large pot in a sunny spot.
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Top FAQs
Explore our library of most commonly asked questions. FAQs are categorised across plant types, growing method, growth median and general categories of resources.
How long does Clonex remain effective after opening?
Clonex Gel is guaranteed to be effective for up to two years if the recommended guidelines are followed.
What are the twelve essential minerals plants need?
Nitrogen, phosphorus, potassium, calcium, magnesium and sulphur are required in larger quantities; iron, manganese, zinc, copper, boron and molybdenum in trace amounts. All twelve are necessary — a shortfall in any one restricts growth regardless of the supply of the others.
Why do leaves yellow on indoor plants?
Yellowing indoors usually traces to one of three causes: excess water sitting in the root zone, insufficient light, or a nutrient shortfall in depleted potting mix. Checking drainage and light first resolves most cases.
Does repotting into a larger pot solve a nutrition problem?
Only temporarily. Fresh potting mix carries a fresh supply of minerals, but that supply depletes again as the plant grows. Repotting is a structural solution — more room for roots — rather than a nutritional one.
Is GT pH Lift safe to store and ship?
Yes. GT pH Lift is non-dangerous goods, so it can be stored and shipped Australia-wide by standard post or courier.
Can I use GT pH Lift across different growing systems?
Yes. GT pH Lift suits hydroponics, soil, coco coir, propagation and tissue culture, for hobby and commercial growers.
How much GT pH Lift should I use?
Add GT pH Lift gradually using a dropper, mix well, and re-test before adding more.
How do I know if my pH is too low?
When pH drops too low, plants can struggle to efficiently absorb essential nutrients, which may lead to nutrient imbalances, reduced growth, root stress, and poor overall plant performance.
What is GT pH Lift made from?
GT pH Lift is a potassium carbonate based solution.
What is the ideal pH range for my nutrient solution?
For most growing systems, a pH between 5.5 and 6.5 is recommended.
Can I use GT pH Drop across different growing systems?
Yes. GT pH Drop suits hydroponics, soil, coco coir, propagation and tissue culture, for hobby and commercial growers.
How much GT pH Drop should I use?
Add GT pH Drop gradually using a dropper, mix well, and re-test before adding more.
How do I know if my pH is too high?
If your pH is too high, plants may struggle to access key nutrients including iron, calcium, magnesium, and phosphorus.
Top Products
Foliage Focus
Complete Focus
Succulent Focus
Flower Focus
Orchid Focus
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Explore the Planthub
Read grower profiles, plant profiles, browse FAQs and checkout our videos.
Growers Profiles
Nora Mutalima: The Leca Queen
Nora Mutalima shares her journey from soil to semi-hydroponics, how Growth Technology products fuel her thriving indoor jungle, and why leca changed everything.
Tara Peeters
From childhood obsession to award-winning exhibitor, Tara Peeters shares how 25 years of orchid growing and a move from Victoria to Perth led her to discover GT products and transform her collection.
FAQs
What is the ideal pH range for my nutrient solution?
For most growing systems, a pH between 5.5 and 6.5 is recommended.
Can I use GT pH Drop across different growing systems?
Yes. GT pH Drop suits hydroponics, soil, coco coir, propagation and tissue culture, for hobby and commercial growers.
How much GT pH Drop should I use?
Add GT pH Drop gradually using a dropper, mix well, and re-test before adding more.
How do I know if my pH is too high?
If your pH is too high, plants may struggle to access key nutrients including iron, calcium, magnesium, and phosphorus.