Frequently Asked Questions
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.
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.
Please refer to our usage charts on our product pages.
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
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.
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.
Yes, Seasol is taken up very effectively through foliage as well as through the soil.
Pour 500 ml of Seasol Concentrate into the 2 Litre bottle and fill with water.
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.
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
Depending on the water pressure, the contents should disperse within 10 minutes.
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.
Yes, Seasol will not significantly affect soil pH, so it is safe to apply to acid loving plants.
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.
There is no withholding period but as with all plant treatments, it is important to wash edible plants before eating.
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.
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.
Seasol is fine to use for up to five years.
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.
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.
Yes, Seasol can be mixed with any soluble fertiliser.
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.