In article ,
Martin Brown wrote:
On 05/07/2015 12:02, Emery Davis wrote

Was wondering about this as I watched a very welcome rain shower this
morning, but couldn't find much information. Hoping one of our resident
chemists might know something about it.

We all know that root oxygenation is super important for our plants and
in pots can be difficult if soil becomes compacted and/or water logged.
One remedy I've found is using hydrogen peroxide to super-saturate water
for pots, where the plants seem to really appreciate it.

I am not convinced it is super important for most potted plants. It
might be beneficial for some where the roots have particularly high
oxygen demand epiphytes and succulent plants that naturally grow in
rough gravel or scree for instance.

Actually, it is. Most bought plants are in peat-based composts, which
degrade to impermeable humus. 'John Innes' composts are SO much better
for plants that are actually kept. Few plants can handle totally
anaerobic conditions at the root, though some can.


Regards,
Nick Maclaren.