Why you should use Seasol on your plants

Why you should use Seasol on your plants

Apr 19 , 2019

In today’s post, I’m going to chat about Seasol, a product often confused with fertiliser (which it is not).

What is it?
Seasol is essentially a plant pick-me-up, helping to improve your plant’s immune system as well as its ability to absorb nutrients. It’s made from some two species of seaweed, and harvested sustainably too! Think of it like a multi vitamin for your green friends, helping them become stronger and more resilient, versus fertiliser which feeds plants to help them grow faster.

Its benefits include:

  • Stronger roots due to its growth stimulants, which is especially useful during propagation or when transplanting a plant
  • Encouraging flowering & fruiting
  • Increasing a plant’s tolerance to both heat and frost
  • Thicker cell walls thanks to its alginic acids, making plants less susceptible to sucking insects and fungus, which need to break through those cell wall before inflicting damage
  • Increased nutrient uptake, working to complement fertiliser

When & how to use it?

  • I use it when my green babies are stressed e.g. when a plant comes home for the first time, during times of extreme temps, or when a plant is unhealthy due to pests, fungus or root rot
  • For ongoing plant health, apply once every 2 to 4 weeks. For a sick plant, apply it twice, one week apart, then every 2 to 4 weeks thereafter
  • It can be applied all year round (unlike fertiliser which is used in growing seasons only)
  • Being almost entirely phosphorus free, it can be used on any plant in your indoor or outdoor garden
  • I usually spray it into the soil, and then water after (warning, it can be stinky, so I find watering it down after helps) but it can also be applied to the leaves
  • For more info, visit the Seasol website or refer to the packaging for specific instructions, as it comes in a range of concentration levels

If you're in Aus, it's easily found in the garden aisle of your local supermarket, at Bunnings or at any nursery.

xx Rachel

Seasol Tips


  • 19 Apr 2019 Bill Massie

    Try the ALDI brand, Gardenline currently 2 pack for $10.00

  • 19 Apr 2019 Bill Massie

    Try the ALDI brand, currently 2 pack for $10.00

  • 19 Apr 2019 Lush Little Jungle

    Hi Teonia,

    I don’t believe it is sold in the US from what I’ve heard. But you could try searching “seaweed solution plants” in Amazon to see what you can find!

  • 19 Apr 2019 Teonia

    Can you tell me if seasol is sold in the u.s. and if not is there something similar? I’m wanting to try it out but can’t find it anywhere.
    Thank you for the blogs you’ve given me some good info!

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