Continuing Adventures in Hempy

Mothers Penis · Post by **Mothers Penis** » Sun Mar 14, 2010 11:09 am

Soil is like a big water sponge with light/heat hitting them all the time creating evaporation ... In hydro the medium is mostly here to hold roots and holds very little water , so basically water is more isolated from light/heat in hydro then in soil .

arb · Post by **arb** » Mon Mar 15, 2010 12:42 am

This should not surprise anyone but I can't quite get my mind around that for some reason.

JapanFreak · Post by **JapanFreak** » Mon Mar 15, 2010 1:14 am

Water is going to evaporate no matter what but I think that he is saying that it evaporates easier from the exposed soil then water which is normally covered up in a rez.

Trees · Post by **Trees** » Mon Mar 15, 2010 1:21 am

>>>In hydro the medium is mostly here to hold roots and holds very little water , so basically water is more isolated from light/heat in hydro then in soil .

That would make it a substrate, not a medium

PGs GossipGrrl™ · Post by **PGs GossipGrrl™** » Mon Mar 15, 2010 1:43 am

Trees wrote:>>>In hydro the medium is mostly here to hold roots and holds very little water , so basically water is more isolated from light/heat in hydro then in soil .

That would make it a substrate, not a medium

>>>That would make it a substrate, not a medium

Well Juice, we're talking semantics then which is besides the point here; could it also be both a substrate & medium...examples?

PGs GossipGrrl™ · Post by **PGs GossipGrrl™** » Mon Mar 15, 2010 1:48 am

JapanFreak wrote:Water is going to evaporate no matter what but I think that he is saying that it evaporates easier from the exposed soil then water which is normally covered up in a rez.

..oh most likely.

However in ur example of perlite, it holds water (otherwise ur plants would die unless water is constantly being pumped over the roots)...*and* is exposed to heat & light. Ergo, u will get evaporation in same manner as soil, probably fairly close % wise...anyone got plenty of time on their hands to do a side by side comparison in 2 cabs....JF?

Trees · Post by **Trees** » Mon Mar 15, 2010 1:59 am

Juice?

If it's there to to hold roots and holds very little nutriant solution, it's a substrate.

arb · Post by **arb** » Mon Mar 15, 2010 2:00 am

I understood the werds,jesuschrist I aint totally tarded.....................yet.
Just seems to me the medium/substrate has to maintain a certain level of saturation or else the plants will die.
I don't water till runoff in soil,so seemingly the levels of moisture will be approximately the same.
Given the leaf cover and the hassle of even seeing the damn dirt to water I merely question whether the humidity levels are any diff at all.

Trees · Post by **Trees** » Mon Mar 15, 2010 2:03 am

A substrate doesn't need to have any saturation, it can be 100% inert

JapanFreak · Post by **JapanFreak** » Mon Mar 15, 2010 2:04 am

PGs GossipGrrl™ wrote: However in ur example of perlite u will get evaporation in same manner as soil, probably fairly close % wise

I would think so, but I think he was talking about hydro with rezes type systems.