english box is dying - please help

[zamora.com]

we have 2 english boxes with leaves going from copper to yellow - i think
they're dying?!

they are quite expensive and a slow grower and so far they have grown to
about 1 foot each. I have 5 of the same species and only 2 are turning
yellow eventhough it's in the same location.

they're in plastic pots, and I've repotted all of them with new potting mix
and stuff a couple of weeks ago - the other 3 are good and healthy, but the
2 are going yellow - what's going on??? Should I use some special
fertiliser, I'm currently using a slow release one. Is this a good time to
prune the yellow dying leaves, or is spring/summer better?

Please help.

Thanks in advance,
Rom

[Carla]

Sometimes temperature changes cause yellowing and leaf drop. Sometimes it's
a mineral deficiency. If you use fertilizer, make sure it has trace
elements/minerals in the formula as well.

Carla

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