Dry hopping add pellets in the Fermenter
(add towards the end of fermentation, as too early and the CO2 will scour all the aroma ) they will sink when the fermentation ceases 4-5 days
Dry hopping pellets in secondary container ,
Alternatively some people transfer off the yeast cake completetl into a secondary container again to avoid the yeast reducing the aroma as the active yeast attacks the hops 4-5 days.
Dry hopping in the keg with Plugs or whole hops .
ensure you use something to cointaine the plug like Screwtop suggested ( swiss voile or a white pool filter basket stocking bag, its like a ladies pop sock( steralise ) large enough to allow them to expand ,weight the bag down with SS washers steralize ,use dental floss to suspend the bag in the keg .
The reason for the dental floss is you need remove the dry hops from the keg after 5 days or the hops break down and you will get a 'Vegetal' flavour to your beer which you dont want .
You can refresh the dry hopping in the keg after the first week
Dry hopping in the keg effect only lasts s for a few days then you really need to replace ,it is a bit of stuffing around but can be worth it even if ou try it once .
Not everyone likes the flavour from dry hopping in the keg but you never know if you never try it .
Make sure you use the fine stocking so you dont get floaties in in the keg .
you may still get some dust from the hops on the first schooner dont throw that as it tastes the best the dry hops in the keg appear to add a lot of body to the beer.
The best whole hops for Dry hopping are East Kent Goldings for English Bitter ,this is one of the few styles that really traditionally is dry hopped in the English Cask ales , you would not normally dry hop German beers for example ,you could dry hop American APA but I found the Cascade plugs I used added something but not much to the final beer .
Be warned dont leave hops in the keg more than a week or you will get Vegetal flavours from the decomposing hops .
BEST TEMPERATURE TO DRY HOP AT IN THE KEG 20C
Pumpy