Does anyone know anything about gardening?

If you don't know what type they are, the only fly in the ointment is that you won't know their bittering power (usually measured in a lab as 'alpha acid' content). So I would use them as an aroma hop. Pick them on a sunny day, dry them gently, brew a simple pale ale (I brew all grain like this but you could do an extract kit), use a known hop (like fuggles, EKG, available vac-packed in small amounts) for bittering (added first in the boil), and use your home grown beauties for a massive late hop addition, possibly even some dry-hopping in the cask. Boom. Unique beer.