I have cucumbers planted in pots. The first year they did fine and were green thoughout the season. This year the plants start out o.k , later on however the leaves turn yellowish in color. I tried a 3 in one spray (insecticide / miticide / fungicide ) from ace hardware, the problem has still not gone.

Have been putting in miracle grow water soluble fertilizer now and then for the last 3 weeks or so. Initially i thought i saw some improvement but the leaves still look yellowish.. One of the plants was o.k till about 4 days back but turned yellowish in the last few days... Any idea what it is ??.

1)too much / too less water.

2)too much / too less fertilizer.

3)pests / fungus etc

Thanks

Hasan

Here is a link that might be useful: photo