Seaweed feed

Would you use seaweed liquid feed on a courgette plant with fruit on it, so it gets on the fruit? I really need to get some of the granular slow release stuff Vitax do, works out much cheaper than liquid tomato feeds and I like the idea of having a slow and steady supply to the plant, but at the moment I haven't got any and I just wanted to give a little feed to one of my courgette plants that's growing some decent sized fruit.

I tend to use seaweed feed more as a pick me up for ailing plants.  I am currently spraying my peach trees which are infected with leaf curl 

Potato feed is high potash, isn't it? I have a suspicion there's not a lot of difference between the Vitax tomato feed, potato feed and slow release fruit feed. I always end up with a host of different feeds and I always have a suspicion they're much the same thing.

I have used seaweed feed to feed tomatoes quite successfully when I ran out of the usual tomato stuff.   It seemed to work quite well.  I normally reserve seaweed as a pick me up for veg not doing so well, it seems to perk up beans after transplanting quite nicely.   I think it's good stuff, although quite pricey a little goes a long way.

I think there is a difference between seaweed liquid feed and seaweed extract, which is a pure seaweed spray used as a pick-me-up for soil and plants, rather than as a fertiliser.

The one I use is Vitax seaweed extract. The blurb says:
Its regular application will promote healthy growth of all types of plants, flowers and vegetables. It will also help plants withstand environmental stress and attack from pests or disease.  It can be used as a liquid root drench or applied as a foliar spray to the leaves of fruit, flowers, vegetables, shrubs and trees.

I usually leave a big bucket of comfrey and nettles stewing all year round and bottle the stuff around about now (just done it this year and started a fresh batch off). Would adding a bit of seaweed make any difference? Would it break down in the same way? Usually I'm left with black, smelly water and bit of residue in the bottom, but as seaweed is aquatic, I'm not sure what I'd get.