Originally Posted by gaberoo

I read (somewhere) or was told that Superthrive would protect the plants (make them hardier down to one zone: so instead of tolerating cold from a 9 zone, the plants would be hardier down to an 8 zone).
I had several plants/trees die on me during one of these cold snaps (one of them being a 6 foot neem tree). I'd like to prevent that from happening again.
How Superthrive supposedly does this I do not know. Does it help the plants become established quicker by helping develop the root system? Is this the mechanism?