I have 5 healthy fuchsia plants, grown from seedlings this year, but barely any flowers?
They've been watered through the hot spell and fed with Miracle Gro but it's all foliage and no flowers...?
Certified GKH Gardening Expert
The MiracleGro will be the cause here. Anything with slow release, or too much nitrogen will prevent flowering. You will need to switch out the soil with something that does not have a slow release nitrogen, but higher amounts of phosphorus and potassium.
This article will help on the care of these: https://www.gardeningknowhow.com/ornamental/flowers/fuchsia/growing-fuchsia-flower.htm