Growth Science Solid Start - 1 GAL / 4 L - Case of 4Growth Sciences Solid Start is a vegetative cycle booster derived from cold pressed kelp that can be used as a root drench or foliar spray. Extra nitrogen and potassium also help bolster the necessary macronutrients needed to support vigorous vegetative growth, while minerals and compounds found in the cold pressed kelps aid in vital plant processes. Why use Solid Start? Solid Start is an excellent way to rapidly increase vegetative growth, leading to