There is a higher likelihood that you have crap on your pc that will randomly redirect you to other websites then what you initially click for then there being a problem with the forum.
I recommend running an antivirus scan and malwarebytes.
I scanned, and it turned up nothing.
I have been redirected to that gardening site twice since I posted the original time, and it was only while on this forum.
It is not a major problem or concern for me, I just wanted to direct your attention to it if this was something that you felt needed addressing.