Citrus Growers Forum

Evaldas · Posted: Sun 30 Jan, 2011 5:22 pm

Hi,
I'm currently growing a dwarf Eustis Limequat tree under CFL lights (more about that in THIS thread).
It's put in a box that stands near a radiator, there are two 85W CFL 5500K bulbs supplying the tree with light.
So I put it in the "mini green house" after Christmas and it immediately started growing enormously. But now it seems like the leaves have stopped growing. Last week I had a suspicion that the foliage might've stopped growing so I decided to measure one specific leaf, one that's closest to a bulb. I tied a string on it so I would know which leaf it is, I measured it on Wednesday and it was 4.2 mm and today it still is 4.2 mm (let me remind you that Eustis Limequat normal sized leaves are about 70+mm).
I just measured the temperature is 26C, and the roots are also around 26C.
What could be causing this?
Maybe because of micro nutrient fertilizer? On the January 20th I noticed some deficiency on the foliage. Since the leaves weren't mature yet (and as I've heard deficiencies can be fixed if the leaves haven't reached 2/3 of their full size) I decided to treat it with micro nutrient fertilizer, I bought a bag of B, Cu, Mn, Mo, Zn, MgO, Fe (all soluble in water, no NPK). The powder was green, I put 1 g into 2l of water (exactly what the directions said). I made a solution and watered the 17cm (~6.7") pot with 2l of the solution. The deficiencies haven't disappeared. But maybe that's what caused the stop of growth?
I water usually 200-250 ppm NPK 6+4+6 + micro nutrients fertilizer every watering. But that time when I used the only micro nutrient fert. maybe the tree was shocked because of not getting any nitrogen and stopped growing? Plus I poured 2l of that solution, when I usually water (with the normal NPK fert.) I pour 1l of the solution. But last week when the soil had dried I watered it with the NPK solution and it still hasn't grown.
What do you think?
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