No. Give them a good water with rainwater. Then use
Miracle-Gro which is a soluble plant food for acid loving
plants, every 6 weeks during the summer.

Azalea, Camellia, Rhrododendron, Berberis, Magnolia,
Heather, Hydrangea, Pieris, Raspberries, Skimmia,
and Blueberries.

I have to make up 3 watering cans of this plant food
to feed all this type of plant that I have. One time I put
them altogether on the gravel bed so that I didnt forget
one !
Then I made a list.

Why not a tomato feed? This is specifically designed for fruits. It is what I use for all the plants and bulbs that I feed.

I thought they needed an ericaceous feed too. Is that just for the spring feed?

Sometimes wish I had studied Biology and Chemistry instead of shorthand typing.

Am into pencil sketching now - really enjoy it.
Am finding lovely evergreen plant leaves in the council
garden areas, they reflect the sunshine after rain. I only cut one off.