Kelp meal can be used dry if the soil is watered immediately after application, but works best when pre-hydrated (swollen in water) prior to mixing into the top 10-15cms of soil.
Add dry kelp meal to the recommended volume of water. Allow to hydrate for 6-8 hours in a shaded place or overnight and then mix evenly into the soil prior to planting. When watering intervals do not exceed 7 days, use 1% Kelp meal. In very arid, sandy soils or when
watering exceeds 7 days, use 2% kelp meal.