I need some of the forums expertise. Please take a close look at the pic and tell me what this is. These are under t-5 grow lights, 6500K. Basically all of these plants are exhibiting the same symptoms except the violette de bordeaux. They were doing great. I was putting them outside during the day when it was warm before the storm we are currently having on the East Coast. .They would get full sun about 3 to 3.5 hours a day. Then dapple shade. At night they were under the grow lights. Fertilized once a  week with 1/2 house plant strength MG. They are planted in a 50/50 mix perlite/leaf mold mix. They put on new leaf growth and were doing great. Anyway, once I brought them inside this has occurred to four out of five of them. It's not catastrophic yet but I do not like the way it seems to be going. There is no heating mat. I'm going to fix that this week. Definately   looks worse in person than in the pics.

Forgot to say. Been using Gnatrol from beginning. There are no gnats. I also do not believe this is an over watering issue. They have been in the same range as per a scale from the beginning. Thanks.

Liquid cooper fungicide will fix this problem ebay offers some good brands.

Hi Blackfoot,
Tiny leaf is a sign of lack of gazoline in the mix - well, fertilizer I mean .
I would add some blue bullets fertilizer 10/10/10 and/or some dried manure - I found the sticks of dried manure in some nurseries and trees seem to like it as when watered the sticks of manure will break down and get inside the mix and near the roots of the trees.
Could be that your mix is not holding enough water too. I would check an hour after watering the pots if there is still some moisture at the top of the pot.
Are you top or bottom watering ?
Could be a problem with low temps ... Are you monitoring the temps, especially when inside ?
Could be insects since your pots are outside sometimes. Check the base of the trunks and the leaves. If you find some tiny spiders ... crush them ...
Try to check the dirt in the bottom of the pots for some insects overwintering there.
Good luck !

 Thank for the replies.

Hi Richie: Do you think this is leaf rust? If so I don't know. It manifested itself when I brought them and kept them indoors because of the storm (5 or 6 friggin days). Indoors my house is 55 to 60% humidity. Not really the right conditions for leaf rust.

Hi jdsfrance: These are small plants from plant tissue culture made by Wellspring. The leaf size is just because they are babies. I am top watering. If anything they are getting too dry, The temps are are 67 to 73 degrees. As far as insects I just don't know. Anything is possible but as I said above I have used Gnatrol from the beginning and I see no gnats flying around. I do not see any insects visible to the naked eye or upon exam with magnifying glass. I am going to water them a little more than normal. I will let you know. The sun will come out soon though. I wonder if that will help. Oh and also I am getting a heat mat. That may help.

Thanks

What do the undersides of the leaves look like. In my experience rust first shows up on the underside.
It might also be sun burn. if the plants went from grow lights to 5 hours full sun, that could burn them.... better to go from grow lights to dappled shade/light.
water stress is also a possibility. Leaves that regularly get dehydrated will brown up like that.

Ah. Thank you Grant. The undersides of the leaves do not show the discoloration. So, I do not think it's Rust. I also don't think its sunburn since those particular leaves (only one leaf on each plant exhibits the symptom) were created during the sun and grow light shuffle. If not nutrient deficiency it may be water related. But they never wilted.

OK. So, I watered these more. Seems to have helped. It certainly has not gotten any worse. Fairly sure this was they were not getting enough water. I am watering by scale weight and I did not adjust for new growth. So the weight of the new leaves was coming out of the water weight that would have been in the soil. Lesson learned.

I thank you all for your help.