I ask because I just had a user contact me about cattleyas and nobile dens growing outside in Florida.
They often tolerate the 40's before being brought in, but the observation was a reddening of the edges of older/lower leaves (possibly indicative of P-deficiency), and apparently premature loss of lower leaves.
The question was "can the low mineral levels lead to lowered temperature tolerance?"
I am close to 1 year of exclusive use of the formula on a wide variety of plants - paphs, phrags, a variety of vandaceous types, cymbs, catts, phals, oncids, etc. - and I have seen no negative effects.
Thoughts? Comments? Possible alternate explanations?
They often tolerate the 40's before being brought in, but the observation was a reddening of the edges of older/lower leaves (possibly indicative of P-deficiency), and apparently premature loss of lower leaves.
The question was "can the low mineral levels lead to lowered temperature tolerance?"
I am close to 1 year of exclusive use of the formula on a wide variety of plants - paphs, phrags, a variety of vandaceous types, cymbs, catts, phals, oncids, etc. - and I have seen no negative effects.
Thoughts? Comments? Possible alternate explanations?