Hey everyone, i haven't been on much, i been so busy with school and working. Anyways my navel orange is finally putting on new growth(it didn't all summer) and it is in my little greenhouse. It has now decided to put on new growth, the leaves are very tiny right now and i am noticing that some of them are shriveling up before they even have time to start growing. THe tree is on the floor which gets cold at night so i think it has something to do with that, i am planing to put it on some heavy duty strofoam for insulation and i may be putting christmas tree lights around the pot. the only thing is all my other citrus are doing fine in the greenhouse, my keylime is also on the floor and is still putting out nice new growth. also i'm trying to maintain the night temp around 55-60F, which i know isn't ideal and i am trying to insulate the greenhouse better. do anyone know why some of the new leaves are shriveling, it is also putting on flower buds which is the opposite time of year.

How warm is the greenhouse getting during the day? I was getting curled leaves but it was due to heat and lack of water...

Could you post us a photo? I would check the roots to make sure it is not being overwatered.Your temperatures are OK-but cool moist soil can cause some trouble-I hope you don't have any root rot going on.Here in Florida I have seen problems with new growth due to thrips and mites-and in one case too much ammonical nitrogen SusanB does have a good point that excessive heat during the day coupled with being too dry can zap tender new growth too.

The medium in the pot is almost pur CHC and i check the bottom of the pot for wettness by putting my finger a drainage hole and it has been fine not wet, but a nice moist soil. they temperature goes queit high in the day i think, so it may be that.

A medium mix high in CHC is almost impossible to over water, also provides good aeration to the root system. However, if citrus roots are at a temperature of 55.4F or below they cannot function. even at temperature above, but near 55F root function will be slow. Check the root zone with a thermometer. Also if your greenhouse daytime temperature reaches temperatures higher than 100F the newest growth, could have a hard time.

Thanks millet i thought it might be the root temperature, i will just have to find a way of inreasing the temp. but right now i am limited on how much electricity i can use in the greenhouse without blowing a fuse!

Hello,
if you cannot warm up the root zone, well, shade the canopy.
This will also help, as fasr as my experiences reach.

Steve, I have found that to be true as well-- we recently had temps in the upper 40s while I was out of town. I still had my seedlings in pots under the shade cloth I used for summer and never had any leaf drop.

They seem to doing fine now i think it was just the fact that rootzone was to cold but i fixed that and they are growing great now, and i have some blooms in Nov!