Can anyone recommend the best home-made or shop-bought, all-purpose fertiliser/feed for the garden? I’m talking about something that will do a decent job for borders AND pots. The choice of feeds and fertilisers at the garden centre is just too bewildering. I've heard tomato feed does a good all-round feeding job. Is this correct?
Also, are there any plants, shrubs or flowers which definitely DO benefit from their own specialist feed (e.g. roses)?
Looking forward to your responses.