Yes that's true, Ivy is hardy..... For this to be good science i.e. 
repeatability I should have ask , I believe it was Marshal, for type plants, 
stage of growth, soil used and all the other controls needed. Wasn't all that 
serious about it...... good science can be hard work, one must be serious in 
wanting to KNOW if what they THINK is TRUE

larry tankersley; Gainesville,Florida USA