I think so. Certainly the traditional fertilizer is horse manure. If you have access to well rotted stable sweepings, you can apply them as a mulch.
Liquid compost or seaweed would probably do good - but might not be enough on its own. They are very nitrogen hungry plants.
One kid says "My dad puts horse manure on his rhubarb". "Oooh!", says the other kid, "in our house we have it with cream and custard." (sorry, couldn't resist sharing)