Angling Times (UK) PREPARE YOUR OWN SPEEDY HEMP 2016-07-26 - HEMP is a favourite barbel feed and dead easy to prepare, but it normally needs soaking and then boiling to get it just right. Fortunately there is an easier option if you have a coolbox or an old flask. Here’s what I do... A bait dropper is essential in fastflowing or deep rivers. Half-fill a flask or a small coolbox with dry hempseed. The container must have a tight-fitting lid in order to retain the heat. Fill up the vacuum flask or coolbox with boiling water and put the lid or screw top on immediately. Add a teaspoonful of rock salt to each pint of hemp for added attraction and it’s ready to go. Leave the hemp overnight and by next morning it will have swelled up, split and be perfectly cooked.