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Frequently Asked Questions
What is the difference between Seasol and PowerFeed?

Seasol is made from two species of seaweed - Bull Kelp (Durvillaea potatorum) and Knotted Kelp (Ascophyllum nodosum). It is not, by definition, a fertiliser (as it contains only marginal nitrogen and phosphorus levels). Seasol seaweed concentrate is a complete garden health treatment that contains plant nutrients, trace elements, alginic acid and other bioactive compounds. Seasol promotes healthy roots, encourages beneficial soil micro-organisms, stimulates flowering and fruiting and helps plants to cope with stresses like heat, drought, frost and pest and disease attack.

PowerFeed is a fertiliser. It has a fish base which is fortified with nitrogen, phosphorus and potassium. The ratio of which is Weight to Volume N 12%: P 1.4%: K 7% respectively. PowerFeed also contains dynamic soil improvers in the form of humic acids. These compounds work at very low rates and are literally like adding liquid composts to the soil. As well as being a quality fertiliser, PowerFeed is also a clay breaker. It stimulates beneficial soil microbial activity and markedly reduces leaching in sandy soils.

What is the NPK of Seasol?
Seasol contains only very minor quantities of Nitrogen, Phosphorous and Potassium Weight to Volume N 0.1%: P 0.01%: K 1.8%. It is not, by definition, a fertiliser (as it contains only marginal nitrogen and phosphorus levels). Seasol seaweed concentrate is a complete garden health treatment that contains plant nutrients, trace elements, alginic acid and other bioactive compounds. Seasol promotes healthy roots, encourages beneficial soil micro-organisms, stimulates flowering and fruiting and helps plants to cope with stresses like heat, drought, frost and pest and disease attack.
What are the application rates?

Please refer to our usage charts on our product pages.

How often should I apply Seasol?
For optimum results it should be applied to the garden every 2 weeks, more frequently (every week) if plants are under stress. Unlike fertilizers, Seasol can be applied all year round, even in winter and at the height of summer
How often and what rate of Seasol should I apply to a sick plant or tree?
We recommend initially two applications, one week apart. Apply to the soil, at double the normal rate. Then apply fortnightly, gradually scaling back to the normal rate.
What is the best time of the day to apply Seasol?
First thing in the morning or late in the evening. Do not apply Seasol during the heat of the day. If fungal problems are an issue, it is best to apply Seasol in the morning to avoid moisture residue on the foliage overnight.
Can I apply Seasol to the foliage as well as the soil?
Yes, Seasol is taken up very effectively through foliage as well as through the soil.
How much Seasol do I need to refill the 2 Litre Spray Pack?
Pour 500 ml of Seasol Concentrate into the 2 Litre bottle and fill with water.
How much PowerFeed and Seasol do I mix in a 2 Litre Spray Pack?
Add 500 ml PowerFeed, 500 ml Seasol and 1 litre of water to a 2L spray pack. Make sure that you DO NOT refill any spray pack that has been used to apply herbicide or other toxic products.
What is the dilution rate of the 2 Litre Spray Pack if I want to use it in a 9 litre watering can?
Weak solution (eg. for seedlings, new plantings, etc): 150 ml per 9 litres of water
Medium solution (eg. for established garden, etc): 200 ml per 9 litres of water
Strong solution (eg. for large and/or stressed trees): 400 ml per 9 litres of water
How long does it take to empty the 2 Litre Spray Pack?
Depending on the water pressure, the contents should disperse within 10 minutes.
Is Seasol safe to use on natives?
Yes, because Seasol is virtually phosphorous-free it is safe to use on phosphorous sensitive native plants. You can use it on every type of plant in the garden.
Is Seasol safe on acid lovers such as Camellias and Rhododendrons?
Yes, Seasol will not significantly affect soil pH, so it is safe to apply to acid loving plants.
Can I use Seasol on my vegetable garden?
Seasol is safe and very effective on all food crops. Seasol increases yields, promotes overall health and even improves flavour! Apply at the rate of 30 ml Seasol per 9 litres of water every 2 weeks. As with all plant treatments, wash edible plants before eating. For optimum results use Seasol with PowerFeed for Vegies.
If I apply Seasol to my vegetable garden, can I eat the produce straight away or is there a withholding period?
There is no withholding period but as with all plant treatments, it is important to wash edible plants before eating.
Can I put Seasol on dry ground?
If the soil is very dry you should damp down prior to application to help with absorption. If this is a recurring problem and you experience a lot of runoff we would recommend using Seasol Super Soil Wetter every 3 to 6 months.
Seasol has stained my pavers, what can I do to get it off?
Because of the naturally occurring colour of kelp, Seasol can stain just like beetroot and red wine. If you do spill Seasol on concrete or pavers you should rinse it off ASAP to avoid staining. If you have an existing stain try applying a product called '30 Seconds'. It is a Sodium Hyper Chloride based cleaner. Other customers have had great success removing Seasol stains on pavers and concrete with this product.
Does Seasol have a use by date?
Seasol is fine to use for up to five years.
Can I store the mixture of PowerFeed and Seasol?
We recommend that when the concentrates are diluted with water the product is used within 24 hours to avoid contamination and maintain the integrity of the product.
What do I do if my dog licks Seasol?
If your pet drinks Seasol, it would be advisable to supply him/her with plenty of fresh water to dilute the contents in the stomach. Due to its alkalinity, gastric irritation may result if significant quantities of the concentrate are ingested. In this case please contact your vet.
Can I mix Seasol with soluble fertilizers?
Yes, Seasol can be mixed with any soluble fertiliser.
Does Seasol contain a lot of salt?
Seasol is made from two species of seaweed - Bull Kelp (Durvillaea potatorum) and Knotted Kelp (Ascophyllum nodosum), both which come from the sea. The sodium and chloride levels are very low because the kelps do not actually absorb the salt.