My blueberry bushes

Hi, about a week ago I bought a couple of Blueberry bushes (a Goldtraube and a Patriot) which I then repotted into larger pots.

Looking at them now ive noticed some colour changes on the leaves.

The leaves near the base are going yellow while all the other leaves are going red.

Ive googled it but no definitive answers, is there something wrong with the bush or is it just the lack of sun from this time of year?

Ive ordered a PH testing kit as recommended but itll be afew days before it arrives.

Any help would be appreciated as i am a complete novice at this and due to where i live, anything i need to get for the garden has to be ordered online.

Ta

 

Rust disease? Have a look for that in google images etc. Although, if you have just replanted them then it may be a nitrogen issue.

 

Ive just ordered some ericaceous compost and feed. Im hoping this may help.

 

If you didn't use ericaceous compost then, when that arrives, shake off the compost from repotting and re-pot them again with the Ericaceous. I wouldn't have expected the plants to object to pH within just a "week ago" though

In case you were not aware you should only water them with rain water