"One major supplier of urc's has moved their stock production to a different location. The environmental conditions there is reducing the starch built up in the cuttings making it tougher to get uniform rooting. I don't know if that's…"
Anyone else having unusual difficulty rooting petunias this year? Usually the Surfinias root in a flash but not this spring. Other types of urcs are rooting as usual. Definitely seems nutritional and we will crank up the feed but we have never had this type of problem before. See More
"Carole, here's what Joyce said (sorry for the delay):
"For ethephon, I remembered Peter Konjoian talking about this, about it having to do with acidic nature of the product. So, I went looking and found the info below from the 1995 EPA…"
"I've often wondered the same thing. I've fired off an e-mail to Joyce Latimer to see if she can offer any insight. I can't think of another chemical we use in the nursery that has a 48 hour REI. We only use those with a 24 hour REI…"