seedlings underside of leaf darkening

R

rupy

Member
Hi Guys

I have three seedlings 11 days old they have been in propagator for 11 days humidity 80 and temps between 20 and 23 max mainly 20. I have noticed the underside of the leafs on all of them are turning dark and on one it is showing on the top of the leaves.
I have kept ph at about 6.2 though it did go over 7 when i added rhizo and forgot to ph down anyone any ideas please.
 
chairroller

chairroller

Active Member
It's darker because it's a big cooler than it should be ! 20°C isn't good for 'em, they gonna be less soft (you will notice if you touched the leaves before and after !) and that's wat gives them the dark colour !!
 
chairroller

chairroller

Active Member
rupy said:
Hi Guys

I have three seedlings 11 days old they have been in propagator for 11 days humidity 80 and temps between 20 and 23 max mainly 20. I have noticed the underside of the leafs on all of them are turning dark and on one it is showing on the top of the leaves.
I have kept ph at about 6.2 though it did go over 7 when i added rhizo and forgot to ph down anyone any ideas please.
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With normal levels of CO2, in a well vented space, 90 degrees would seem to be the absolute max, while 85 may be closer to optimum, even with a great deal of light available. Do not let the room temperature get over 35 C (95 F) as this hurts growth. Optimal temperature is 27-30 C (80-86 F) if you have strong light with no CO2 enrichment. Less than 21 C (70 F) is too cold for good growth.
 
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