General purpose (vegetable) fertiliser?

I've got some rather old pelleted chicken manure, plus some granular Growmore. I have no access this year to rotted manure, compost etc, so I'm looking for cost-effective agricultural (possibly liquid) fertiliser, maybe NPK+S, that I can get in single 25kg or 10L. Any ideas?

 

You can by growmore in those plastic buckets and also chicken manure, its not cheap nowdays though.
I dont use liquid feed other than for pots.

 

Depending on the quantity involved, you can get bagged composted manure. Just a word of caution though, there have been cases of Aminopyralid contamination, indeed I was unfortunate to acquire some myself. The good news is that you can test for it by carrying out a bean test.

 

Noticed someone with bagged "farmyard manure" today. Looks expensive! I was thinking about using comfrey, but I haven't got any. Is there any reason I shouldn't use grass clippings similarly to make liquid feed?

 

You can get liquid Growmore from some suppliers.
Grass clippings are sometimes used as a mulch around shrubs and bushes, but I haven't heard of them being used to make a liquid feed.
Nettles can be used as can comfrey; stinks though and remember to dilute.
Comfrey "Bocking 14" is often used as this is a sterile form and so doesn't selfseed all over the place.
Comfrey is deep rooted and is supposed to bring up trace elements from the lower soil levels.
Comfrey has been used as a herbal medicine, typically as a poultice to aid healing of cuts and broken bones.