Dr Greenthumbs Ocean Grown - Fish Hydrolysate (Pure Fish)
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Dr Greenthumbs Ocean Grown - Fish Hydrolysate (Pure Fish)
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Ocean Grown - Fish Hydrolysate (Pure Fish)

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Dr Greenthumbs
Size: 500ml
Price:
$14.00 $16.00
EMPTY DOM REMOVE PROTECTOR
EMPTY DOM REMOVE PROTECTOR

Pickup available at Bellambi

Usually ready in 24 hours

Description

– Your Gardens Catch Of The Day –
Low smell unlike the competition, use inside with confidence!

Ocean Grown - Fish Hydrolysate is a cold-processed fish hydrolysate made from 100% hydrolysed fish, with an NPK of 2.5:1.5:0.3. It is designed as a liquid plant feed and soil booster for growers who want a fish-based input that supports regular garden, indoor plant and hydroponic feeding routines.

This fish hydrolysate is a practical option for Australian growers looking to feed plants through the soil, as a foliar spray or in hydroponic systems. It is especially useful when you want a liquid fertiliser that contains naturally occurring nutrients, amino acids, vitamins and trace elements from hydrolysed fish.

For more context on how amino acids work alongside calcium in plant nutrition, see our guide to amino acids and calcium in plant nutrition.

Key benefits

  • Cold-processed to help retain major nutrients, vitamins, amino acids and trace elements.
  • Made from 100% hydrolysed fish.
  • NPK 2.5:1.5:0.3 for gentle, flexible feeding across a range of garden uses.
  • Suitable for seedlings, transplanting, indoor plants, lawns, fruiting trees and hydroponics when used as directed.
  • Formulated with almost zero smell compared to other options on the market, making it easier to use in indoor spaces and grow tents.
  • Available in multiple sizes to suit trials, small gardens and larger feeding programs.

Best suited to

  • Living soil and organic-style garden routines.
  • Indoor plants, houseplants and grow tent feeding programs.
  • Seedlings and transplanting support when diluted at the recommended rate.
  • Foliar feeding where a fish-based liquid fertiliser is preferred.
  • Lawns, fruiting trees and larger garden areas.
  • Hydroponic systems at the recommended hydroponic dilution rate.

How to use it

Mix Ocean Grown - Fish Hydrolysate with water before applying. It can be used as a soil drench, foliar spray or hydroponic input depending on your setup and plant needs.

  • Seedlings: 3 ml per litre of water.
  • Transplanting: 5 ml per litre of water.
  • Foliar spray: 3 ml per litre of water.
  • Indoor plants: 5-10 ml per litre of water.
  • Lawns and fruiting trees: 10 ml per litre of water.
  • Hydroponics: 3-5 ml per litre of water.

For more background on using fish hydrolysate in the garden, see our guide: Discover the power of fish hydrolysate for a healthier garden.

Choosing the right option

Choose the size based on how often you feed and how many plants you need to cover.

  • 100 ml sample: A good trial size for testing in a small setup.
  • 500 ml: Handy for indoor plants, small gardens and occasional feeding.
  • 1 L: A practical choice for regular use across multiple plants.
  • 5 L: Better suited to larger gardens, lawns or frequent feeding routines. (You may receive 5 x 1L bottles) 
  • 20 L: Suited to high-volume use where fish hydrolysate is part of an ongoing program.

Check before buying

  • Do not apply to stressed or under-watered plants.
  • Do not apply when temperatures exceed 30°C.
  • Always test new products on plants before a complete switch.
  • Store out of reach of pets and children.
  • Store in a dark, cool environment.
  • Check the dilution rate for your specific use before mixing.

FAQs

What is fish hydrolysate?

Fish hydrolysate is a liquid fish-based fertiliser made from hydrolysed fish. Ocean Grown - Fish Hydrolysate is cold-processed and contains 100% hydrolysed fish.

For a practical look at using fish hydrolysate alongside other organic compost activators, see our Australian compost starter guide.

For broader context on how fish-based inputs can fit into a living-soil approach, see our field-tested guide to building self-feeding soil.

For help telling nitrogen-related yellowing from iron or magnesium deficiency, see our yellow-leaf diagnosis guide.

Does it smell?

This product is formulated with a very low smell profile, making it suitable for indoor use when applied as directed. Expect it to smell like a fresh seafood market, as opposed to foul smelling fish emulsions.

Can I use it as a foliar spray?

Yes. The recommended foliar spray rate is 3 ml per litre of water.

Can it be used in hydroponics?

Yes. The recommended hydroponic rate is 3-5 ml per litre of water.

Ocean Grown - Fish Hydrolysate is a flexible liquid fish fertiliser for growers who want a practical hydrolysate option for soil, foliar and hydroponic feeding routines.

For more context on kelp formats and how kelp can complement fish-based feeding, see our kelp meal and seaweed fertiliser guide.

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Frequently Asked Questions

A cold-processed, certified-organic fish hydrolysate that keeps the full spectrum of amino acids, vitamins, and trace elements intact. NPK: 2.5–1.5–0.3. Ingredients: 100% hydrolysed fish.

Nope. It’s formulated to be essentially zero-smell, so it’s fine for indoor use and tents.

Hydrolysate is cold-processed rather than heat-cooked, so more delicate compounds (like aminos) are preserved. That’s the big advantage over emulsion.

Pretty much everything: seedlings, indoor plants, veggies, lawns, fruit trees, and even hydro systems.

Either works. Mix with water and apply as a soil drench or foliar spray.

  • Seedlings: 3 ml/L
  • Transplanting: 5 ml/L
  • Foliar spray: 3 ml/L
  • Indoor plants: 5–10 ml/L
  • Lawns & fruit trees: 10 ml/L
  • Hydroponics: 3–5 ml/L

Weekly to fortnightly is the sweet spot. If plants are very hungry or growing fast, run weekly on the lower end of the rate.

Avoid applying during heat spikes (above 30 °C) and don’t feed severely stressed or under-watered plants. Always spot-test first.

Early morning or late afternoon is best. If nights are humid, stick to mornings to lower disease pressure.

Yes. They’re designed to complement each other. Use both at their label rates, either together in the same feed or staggered across the week.

Absolutely. Keep those at their normal rates—everything plays nicely when used as directed.

Yes—it’s a great fungal food in aerated teas. Just use the brew promptly after aeration stops.

Generally fine at sensible doses. Start low, monitor EC and plant response, especially in hydro.

Yes—use 3–5 ml/L. Start at the lower end and monitor for biofilm and algae. Organic inputs can contribute to biofilm over time, so plan regular system maintenance.

It’s essentially zero-smell, so it’s one of the rare fish products you can comfortably use indoors.

Keep out of reach of kids and pets. As with any fertiliser, water it in well and keep pets off treated areas until the surface is dry.

Store sealed, cool, and dark. Give the bottle a good shake before use if it’s been sitting.

More active soil life (worms and microbes), improved soil structure, and excellent plant vigour. Many growers also report great flavour and nutrient density in crops thanks to the amino profile.

Dial the rate back and/or reduce frequency. Resume at a lower dose once growth normalises.

Back off the dose, pre-dilute thoroughly, and increase filter changes and line flushes.

Flush with plain water, pause feeds for a week, then resume at a lower rate once temperatures settle.

Fish provides “food” (aminos and organics) while Sugar & Kelp brings chelated micros and chitin-driven signalling that supports resilience and root health. Together they’re a classic growth + defence combo. Typical Sugar & Kelp use range: 1–5 ml/L depending on stage.

100 ml sample, 500 ml, 1 L, 5 L, and 20 L.

Yes—pickup from Bellambi, NSW when shown as “Usually ready in 24 hours.”

🌱 Still got questions mate?


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