Thanks tropicb

I did not repot, nor have I watered, .since the pot is still heavy and by the plants depth where roots are, is still damp.

It looks better during the daytime, and sunset , goes to sleep for the night, even though the lights are still on.

Jon

House lights aren't really strong enough to discourage the leaflets from folding up (down actually) for the night. They'll do that if it gets too cloudy during the day.

Thanks Tropicb

I did water yesterday, looks no different.

Should I treat with Thrive?(b vitamins plus)

Not under house lights,

under and surrounded by 1500 watts of

T5 HO GROW LIGHTS.

About 18-20" at closest point, and about 3' under overhead light.

I've never used any type of grow light so don't know anything about setting them up. Tamarinds like hot tropical sun so I guess the instructions with the lights should let you know the correct adjustments. Sudden intense light will, of course, burn the leaves so build up the intensity slowly. The leaves in your photo look okay and suggest they're in failing light. I have the one in a pot but about 45 to 50 larger trees in the ground. The potted one is for friends. I'm giving it to them when the weather is right for planting out. But it doesn't really look any different to yours when it's late in the day.

As far as fertiliser goes, I'd only give it very light doses of anything.

Thank You so much,

I think it is still in shock from being shipped in a box from florida to ny in 2 days. It has been 12 days since first got this baby.

Jackfruits all doing well, even at smaller sizes, tamarind must really need alot more sun.

I am bringing down the overhead light to be closer, up to 4-6" eventually at its closest, perhaps that will help.

What is it about the leaves that tells u it is in failing light. Even though it looks like an alien landing area, my camera light meter, shows as high , only when very close( 3-4" or closer). Too close though, and the heat dries up the foliage

When I say "failing light" I mean end of day or very heavily overcast skies. The leaflets will hang down under those conditions. The colour of your leaflets suggests new growth and/or shady conditions. When the leaves sun harden they're a darker green.

I have an infrared thermometer and I have previously done measurements of plant leaves in full sun.. Can't remember the exact figures now but they were quite high. Outside of course there's always air movement so that helps the plant. Infrared thermometers are fairly cheap and are good for doing surface readings. You could use one to check your plant leaves under the artificial light. They won't give you light levels but at least you can see if the temperatures are getting too high. The sun's too low now and behind cloud but tomorrow I could check the temps on my Tamarinds when the full sun's on them. I've nothing to measure light levels but the UV reading here is 15 around the middle of the day.

Thank You very much

Is 12:1 ratio accurate enough?

I would like to get an extech

42510A for 90.00

thanks

Jon

Mine's a fairly cheap Chinese made model, has a 12:1 ratio.

Today there's a lot of cloud about with a bit of a breeze. Readings on the Tamarinds varied as the sun came and went. They ranged from around 38C to 43C. Ambient air temperature was 35C and RH 52%. But the leaflets on the Tamarinds were mostly folded to avoid too much sun.

Thanks for taking the time to share with me your findings.

I am a bit confused, I though I had read that they like clear cloudless days. Is it possible that this seedling is getting too much light ?

thanks

Jon

It's a question of sun intensity and important factors are location and season. The intensity can vary a lot throughout the year and for locations further from the tropics. Higher intensity means leaf surface would heat up more and leaflets would adjust their angle accordingly. But they also fold up when light levels are low. New growth responds more than old growth does. So checking leaf surface temperature should give a good idea of what's happening.

How did the tamarind recover? Is it ok now? I have one 2 months old seedling, and it grows under two 60w CFL:s. Lamps are about 80cm away from it, and its leaves fold up couple of hours before I shut the lamps for night. And its even partially shaded of my Lucky bean(Castanospermum australe).

So i think that tamarind doesnt need that much of light. Newer growth is light green and gets darker green after a week or so when the leaf is full grown.

i have one that looks exactly like the one in the pic.

the leaves seem to stay folded up. at least mostly...

ive seen them semi-open a few times, but never opened all the way ?

overcast, or full sun, evenings etc...