| I was just wondering about the toxicity of sulphur, kmarch.
Usually they use magnesium nitrate [Mg(NO3)2]. Epsom salt is MgSO4.
In the former formula every element can be made use of by the plant but in the latter I am not sure about the 'S', especially on orchids.
Just a suggestion for you to look into before trying it on orchids.
Good luck. |