Just give it a top dressing of Growmore, forked lightly into the compost, in April.

thanks bamboo

Um, Bamboo, what kind of Growmore? They make dozens of different fertilizers.

Standard, been available for years, just called Growmore, granular nitrate fertiliser, standard NPK, different companies make their own, but all to the same "recipe", invented, I believe, during or just after the war.

PS Tugbrethil, just realised you're in the States, might be something different over there, I don't know.

Here, we have a fertilizer manufacturer (or possibly distributer) named "Grow-More", which offers many different kinds of fertilizers, both synthetic and natural, so I did get confused! Thanks Bamboo!

The one I mean was originally called "National Growmore" over here - it's NPK is 7-7-7.

Thanks, Bamboo!