Hendrick's uses a blend of spirits produced from a Carter-Head Still and a small pot still, originally built in 1860 by Bennett, Sons & Shears.
The pot (Bennett) still is quite small and produces a heavy, oily spirit with a strong juniper-flavour. The botanicals are added into the liquid and effectively boiled which allows most of the flavour characteristics to pass directly into the spirit.
In contrast, the spirit derived from the Carter-Head still is much subtler with light floral and sweet fragrances. This is because all the botanicals used with the Carter-Head are added to a basket at the very top of the still.
The final Hendrick's gin is a blend of these two spirits and is totally unique in doing so, let alone with its subsequent addition of cucumber and rose petal essence that is added before being bottled at 41.4%.
