Sage Nazareth - help!!

Hi everyone,
I've just joined today so hello to everyone, I look forward to participating in lots of posts and learning lots from you all.
I have an opening question... my sage nazareth's leaves are turning yellow, is this normal or have I got a problem on my hands?

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Site Timeline is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.