It looks anaemic in human terms or chlorotic in plant terms. It needs to be watered only with rainwater if your tap water is at all hard. It could do with a feed of specialist ericaceous feed which allows it to take up nutrients such as iron. A foliar feed of Epsom salts - 15g to 5litres of soft water - will restore a magnesium shortage.
I suspect it would also benefit from going in the ground in a well prepared hole or else a bigger pot with some fresh, ericaceous compost underneath and round the sides.
Vendée - 20kms from Atlantic coast.
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In the sticks near Peterborough
I suspect it would also benefit from going in the ground in a well prepared hole or else a bigger pot with some fresh, ericaceous compost underneath and round the sides.