[Arid_gardener] Citrus in Pots

[diane elliott]

I have a dwarf tangerine and a dwarf Meyer Lemon in 24 inch pots.

They both were decimated by frost last year, despite being covered, but came
back-but with no fruit.  The tangerine looks fine, nice glossy green leaves,
and seems to have recovered well.

The lemon tree looks a bit sick-with leaves yellowing at the edges.  They
are flood watered when necessary (a couple of times a week, less now).  Is
this just end of year leaf drop?  I did give them ammonium sulphate, but
someone said it may need 'trace elements'? What would provide this, and when
should I do it now it's winter?
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