acidic solution vase will cut preservative solution is acidic (Ph value of about 4-5 ) . Replacement of the acidic solution is a metal vase metal ions , the high concentration of metal ions , dissolved in the solution ,taipei florist, the performance of the plant toxin , the result is severe flower petals leaf burn and wilting . harmful elements for cut flower ( plant toxins ) a variety of metals can be made into a vase or basket of flowers. But very low levels of a variety of elements even in the case of fresh flowers will also cause damage , such as chlorine, boron, zinc , cadmium, copper and iron. High zinc Solution : If the acid solution was placed in the bucket zinc , zinc ion concentration in the solution will be increased to 160 mg / l , which can cause serious damage to leaves and flower petals . Even zinc bucket using tap water, replacement of zinc ions on the flower is also a great harm. high copper solution : copper ions in the solution concentration of 10 mg / l, it will cause great harm for cut flowers . fluoride solution : the concentration of Cut harm is 5 mg / l. Fluoride is easy to daisy and freesia harm on gerbera petals are very harmful ,Sanming flowers, and its symptoms are gerbera petals black, and not only in the red varieties . Currie 's HealthCare fresh experiments show that the fluorine concentration of 2 mg / l, Lily will accelerate leaves yellow. zinc bucket on how to avoid the damage of flowers If you must use zinc bucket , how to minimize the damage caused by its flowers ? The answer is very simple, in zinc bucket plus a plastic sleeve , so that the surface of the zinc and the solution can not be in contact