They sound quite good. Might try a few of them next year.
As to your question, no idea clematis, at a guess not enough K for roses, and as for veg, depends which one.
So not a lot of use really.

Thanks Scrumpygral

In fact, i'll try a lot of them this year.
I've looked through all their products and they are very similar to the chempak products that i use, only a bit cheaper.
Their soluble powder fertilisers, Elixir 2,3,4 and 8, are very good formulas. The high nitogen, no. 2 i think, would be good for brassicas.
The products with liquid seaweed also look very good. The higher the Potash, the better for flowers.
The higher the Nitrogen, the better for veg except carrots.
Too much nitrogen and they will split more easily.
Certainly far better products than anything you will get at garden centres/diy stores.

Marvellous answer Scrumpygraham,Thanks again, Phil

What is the difference between fertilisers and plant food?

Nothing really.
Fertilisers prepare the soil. Foods feed the plant and soil after planting.

thanks again srumpy.