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Quote:

Originally Posted by naoki (Post 678696)

They look like that they are growing well. The newer leaves looks a bit greener than the older ones. Did you change the light, too?

The lighting has been the same since I start growing them.
All the phals were bought this year. A few last year in December. Same with the lights. You can clearly see the difference of the growth of the previous owner and now.
It maybey lighting, co2 or combination of a few things.
I really don't know.

Photo take April 14th 2014
Phal hieroglyphica

Photo take today May 14th 2014

I also noticed on my phal borneensis
A larger bloom. It has had 4 blooms on one of the spikes.
This bloom was much lager then the prevous 3
1/4-3/8 larger.
I wish I had a photo of one of the first blooms.
Here's a photo of the newest. 1/6 shy of 2"

Generally, more biomass information seems to be generated by people who study alternative fuels.

Quote:

Originally Posted by Philipm (Post 678924)

I see, I guess that it is likely due to the difference from the previous owner's condition. hieroglyphitica doesn't seem to have difference in color. I was curious about this because there are some studies showing that plants acclimate to high CO2 environment after a while. I didn't know about it until someone in Slippertalk forum pointed it out, and I looked into it. Some species change the nitrogen allocation within chlorophylls, so I thought the color may change, too. Some studies show that the initial benefit of elevated CO2 can taper off. So it will be interesting to see how yours will do in a long term. These are studies in plants other than orchids.

Nice species Phal collection! Where did you get P. borneensis? I finally found one from LOC. I hope it is correctly ID'd (LOC people know well about Phals, so I'm optimistic).

Quote:

Originally Posted by naoki (Post 678963)

Thank you.

My borneensis came from orchid web.
I also bought a phal from LOC. I really hope my id is correct as well. Only time will tell.

It's been about 4 months now since I started add co2.
Still getting excellent growth and lots of blooms. Nothing negative thus far. Still running the co2 at 1500ppm at night only.
Last month I decided to try and self pollinate a couple plants. So far they are doing good.
Phal sumatrana
Phal inscriptiosinensis

Phal inscriptiosinensis