Viewing post #1506065 by webesemps

Bigtrout said:... but if not enough can be stored, or light levels high enough that it is used up quicker and the plant opens up its stomata in the afternoon, it opens itself up to much greater water loss, which is why it seems when growing Semps that they can take either heat, or alot of sunlight but not both. This is because it causes the semp to use up its CO2 faster and they open the stomata before the day has cooled and now lose alot of water to evaporation.

So this is why heat and high sun exposure is so dangerous to our semps...which is why it's so important to move them into shade on a hot sunny day! And sometimes I bring the shade to them by draping with shade cloth if they can't be moved.