Catt. percivaliana size

[silken]

Originally Posted by Tindomul

Thanks Leslie! I really don't have a way to measure foot candles under my t5 lights. Do you think that an East - Southeast window (a little more south than actual East), would deliver enough sunlight? In the summer it would probably get 5 hours of direct morning sun. It's the best I can do living in an apartment. Or should I look into stronger lights?

Mine grows under 2 T5 HO lights in winter. They are on for 12 hours and the plant is maybe 4 or 5 inches from them. They do have a reflector hood which likely distributes the light well. You can buy the T5's with reflectors now also if they are the SunBlaster brand. A grower who came to speak said he feels that with the reflectors, you maybe get another 50% more lighting than without. The silly little reflectors are sure expensive tho.

[isurus79]

Originally Posted by Tindomul

I really don't have a way to measure foot candles under my t5 lights.

Believe it or not, there's a phone app for that! I use Galactica Luxmeter.

Originally Posted by Tindomul

Do you think that an East - Southeast window (a little more south than actual East), would deliver enough sunlight? Or should I look into stronger lights?

I think more is always better with this species.

[Tindomul]

Originally Posted by silken

Mine grows under 2 T5 HO lights in winter. They are on for 12 hours and the plant is maybe 4 or 5 inches from them. They do have a reflector hood which likely distributes the light well. You can buy the T5's with reflectors now also if they are the SunBlaster brand. A grower who came to speak said he feels that with the reflectors, you maybe get another 50% more lighting than without. The silly little reflectors are sure expensive tho.

Thanks Silken!

[estación seca]

It looks fabulously healthy, with lots of good roots. The color appears a correct light green, indicating good light.

Is each new growth substantially bigger than the previous? If not, I would suspect inadequate feeding, or too-low temperatures.

If you have an old SLR with light meter, you can calculate foot-candles. Aim the camera with f stop 8 at a white piece of paper. Note the exposure time. Look it up on a table I'm sure you can find somewhere on the Web. I don't have it with me but I might remember to look for it later.

Phone apps won't work well unless the developer knows the specs for your specific phone camera light receptor.

[Tindomul]

Originally Posted by isurus79

Believe it or not, there's a phone app for that! I use Galactica Luxmeter.

Really!!! Hmmm. Thanks!

---------- Post added at 01:58 PM ---------- Previous post was at 01:50 PM ----------

I just checked, my phone is not compatible.

[Tindomul]

Originally Posted by estación seca

It looks fabulously healthy, with lots of good roots. The color appears a correct light green, indicating good light.

Is each new growth substantially bigger than the previous? If not, I would suspect inadequate feeding, or too-low temperatures.

If you have an old SLR with light meter, you can calculate foot-candles. Aim the camera with f stop 8 at a white piece of paper. Note the exposure time. Look it up on a table I'm sure you can find somewhere on the Web. I don't have it with me but I might remember to look for it later.

Phone apps won't work well unless the developer knows the specs for your specific phone camera light receptor.

You certainly inspire confidence in this one. The roots are new, I added kelpmax a month ago and they went nuts after that. I'm happy they reached down into the leca and kept growing in that direction. Since then I have been feeding weekly weakly. Something I neglected to do thus far. Also the room it is in can get pretty cold at night, but only recently, not during the summer. I did notice one small leaf is turning red, possibly cold damage and signs of malnourishment? Thanks for your opinion!

[estación seca]

Red Catt leaves is often a sign of strong light exposure. Without fertilizer, Catts in most media we use will hardly grow.

[Tindomul]

I was thinking that too, but there is some leaf damage, and I remember reading here that sometimes cold damage can stress a malnourished plant and show up as colour change.