I have 3 citrus fruit trees growing in large pots, 1meyer lemon,1blood Orange,1 ponderosa lemon. Last year they spent winter in small greenhouse, no fan, no heat but covered w blankets. They survived, barely. Blood orange n ponderosa lemon had booms. I tried to pollinate them w Qtip but destroyed blood orange blooms. Ponderosa is self pollinating n I have 3 huge lemons(3 blooms fell long ago). I need to know what can I do to ensure survival n fruit production for next year. I fertilize them w citrus fertilizer. The plants look very healthy but no oranges, no lemons. I'm planning on putting a fan to circulate air n small heater which I will shut off at night or when I'm not home. Any tips would be greatly appreciated. Thanks!
