my first post was in the wrong forum i think...anyway my girls have been slowly yellowing with stunted growth and slow growing. now, i noticed there is a rusty apperance in the middle of the leaf it seems to be progressing over the past month.i had the same prob last yr and i think i might have figured it out just want to be sure.Boron def.im following floranova nute sched.but i think its my surrounding soil.my area is considered arid coastal climate so the soil is sandy loamy and decomp. granite.some plants read 6.6 to 7.0 on diff..so, if it is whats the best way to fix it? and the yellowing starts at the tips and goes inward 
