This study took place in the research lath-house at Horticulture Department, Suez Canal University, Ismailia.
The aim of the study is to compare different nutrient solution formulas and to study the effects of some naturally
biostimulants (extract of willow bark or juvenile branches) on some vegetative characters of Coleus blumei plants
grown in sand culture. Three nutrient solution formulation as Hoagland solution (A), pot plant solution (B) and solution
(C) which designed and formulated in the Suez Canal University were used. The results showed that the nutrient
solution C, generally, the more beneficial. It produced the tallest plants and heaviest fresh and dry weights of both
above and underground plant parts. On the other hand, the addition of aqueous extract of juvenile branches of willow
led to a significant increase in plant height and fresh and dry weights of either above or underground parts for the three
nutritional solutions. Data indicated that the diameter of the main stem and the fresh and dry weights of the necked
branches were higher in treatments irrigated with the solution C.