Hydra
birthplace
breeding place
brooder
cloche
cold frame
conservatory
coolhouse
cradle
forcing
forcing bed
forcing house
forcing pit
glasshouse
greenhouse
hatchery
hothouse
incubator
lathhouse
milk cow
mustard
nest
nidus
nursery
orangery
pinery
rabbit
rich soil
rookery
seed plot
seedbed
summerhouse
warren
bed
situation
state of affairs
godsend
hydra
stirring
undercurrent