JeffS73
Shohin
So I was crashing CM's indoor thread for a while, but now I've decided to document some of my experiments in their own thread.
I started a bunch of seeds early this year indoors for the first time to get a headstart, including JBP, JRP, larch (I think kaempferi, from local wild seeds) and a bunch of spruce.
Last time I posted on CM's indoor thread, I was having trouble with plants yellowing:
I couldn't work out what was wrong, but after thinking about it for a bit, I decided it was down to the environment, overwatering and the fabric pots.
Here's a view of what part of my setup looked like:
I had fabric pots on gravel to increase humidity in one tray, and in other trays the fabric pots were bunched up really tight, sat on the plastic tray.
The pots were never fully drying out, and I was watering twice a day. I think the plants were yellowing from overwatering. The humidity was very high, like 80%.
I realised fabric pots left on a surface like a plastic tray, even if spaced apart, will wick liquid from the bottom all the way to the top, and stay continually wet until all liquid has evaporated. A more careful approach was required to manage the environment.
Here's what my setup looks like now:
The pots are a lot more spaced out so the air can circulate, and I've lifted them off the trays using chicken wire racks. I opened the side of the tent and now keep the fan going for longer.
I also decided to step the watering down to once a day. My rationale was that if the pots are still wet on the outside when I normally water in the evening, the plants would be ok till the next mornings watering.
The Vapour-Pressure-Deficit (VPD) is now in the right range for young vegetative growth. The plants are a lot happier now!
JBP
Larch
I started a bunch of seeds early this year indoors for the first time to get a headstart, including JBP, JRP, larch (I think kaempferi, from local wild seeds) and a bunch of spruce.
Last time I posted on CM's indoor thread, I was having trouble with plants yellowing:
I couldn't work out what was wrong, but after thinking about it for a bit, I decided it was down to the environment, overwatering and the fabric pots.
Here's a view of what part of my setup looked like:
I had fabric pots on gravel to increase humidity in one tray, and in other trays the fabric pots were bunched up really tight, sat on the plastic tray.
The pots were never fully drying out, and I was watering twice a day. I think the plants were yellowing from overwatering. The humidity was very high, like 80%.
I realised fabric pots left on a surface like a plastic tray, even if spaced apart, will wick liquid from the bottom all the way to the top, and stay continually wet until all liquid has evaporated. A more careful approach was required to manage the environment.
Here's what my setup looks like now:
The pots are a lot more spaced out so the air can circulate, and I've lifted them off the trays using chicken wire racks. I opened the side of the tent and now keep the fan going for longer.
I also decided to step the watering down to once a day. My rationale was that if the pots are still wet on the outside when I normally water in the evening, the plants would be ok till the next mornings watering.
The Vapour-Pressure-Deficit (VPD) is now in the right range for young vegetative growth. The plants are a lot happier now!
JBP
Larch