What fertilisers do you use

...to get decent tasty crops.  I am never sure what to use on what to get the best out of each type of plant or even how often to do it.  Some years I get better crops than others.  I have been researching which has taken far too long,  and have got some sort of list.  I err on the side of organic and I do the smelly thing with comfrey and nettle tea.  What have you found to make a real difference.

It really depends on your soil type. I'm on heavy clay which is hard work, but has the advantage of being very fertile. I can get away without fertiliser as long as I keep adding organic matter to keep the soil microbes happy. Those combined with a healthy worm population seem to give enough nutrients for my crops.

The difficult soil type is sandy which doesn't hold nutrient well and probably needs fertiliser added regularly to keep crops growing well as the nutrients get washed out quickly. What is your soil like?

 I have tubs of growmore, BFB, comfrey , epson salts on the shelf and fresh chicken pooh from the hens. I'll also use specific things like tomato and ericaceous feeds but as Nobbie suggests I'm on sand and nothing hangs around in it for long.

Pretty much the same as Lardman.

I have pure sand 18 inches down.

I use as much compost as I can produce, begging lawn clippings etc from neighbours. Bedding and droppings from the chickens go through the compost route. I hoover and shred leaves until I have filled a 1m³ bin then it decomposes over three years, turning into smaller bins each year as it shrinks (reduces to about 25% of the original). I have some comfrey but it isn't very productive, might be the beech tree overhead.

Added fertilisers I use are BFB and Growmore, plus occasional additions if I think something is lacking.

Composted pine needles or wood chip for the blueberries.

Proprietary tomato feed for the toms and peppers in the greenhouses.

I take it you practice crop rotation, so sooner or later what was your potato bed will become your onion bed, for example.

As I understand it, onions in fact don't mind quite firm soil. They don't do so well on freshly mucked soil (though I always add a bit, I have to admit), but they do like a bit of nourishment, P and K in particular.

I recommend you look at John's advice pages on growing particular veg you're interested in and on fertilisers in general. There's a heap of info there. Check out his piece on agricultural gypsum. That might help your clay soil and make nutrients more readily available to your plants.

In my case, I add muck and wood ash for starters. Onions, leeks and garlic get an extra dose of ash or two during the season and I also give the toms a bit of ash when they're fruiting. Potatoes get an extra helping of muck while I'm earthing them up.

And then I have some granular fertilisers. One that's nitrogen rich for leafy plants and for fruiting plants early on if I think they need it, and one that's P and K rich for when the fruiting plants start to flower and produce. I also went a bit mad and bought a sack of multipurpose fertiliser with trace elements. As I'm quite sparing with these, I now have granular fertiliser to last me this lifetime and the next and probably the one after that!

I bought a small bag of ground hoof (the closest I can get here to bone or BFB) because I wanted to add some calcium, but like Plotmaster, I found it just created a lot of problems as the dogs set about digging everything up repeatedly in the hope of finding something tasty to chew on. So I've given up on that and just stick with the ash.

You might find the current thread on improving soil useful too.
http://chat.allotment-garden.org/index.php?topic=122841.new;topicseen#new

Thank you for your input.  Its something to get my claws into now.