Hello Donna
Your cranberry will be a Vaccinium macrocarpa. The one thing that
people have a misconseption about is that it is grown in water - it is
not. In the USA they are grown in "ponds" which are more peat bogs
that are flooded at harvest time, the berries being harvested with
cylinder lawnmower like devices fitter with combs to rake the berries
of the plant. The berries float and a boom employed to collect them.
It likes a peaty soil that is moist - not wet. If it is wet for a
prolonged period (such as a hanging basket with no drainage) it will
die. Equally if it dries out - particully in the first couple of
years death can occur.
SO soil high organic, preferablly peaty rather than woody or coir -
low pH (3.5 - 5.5), kept moist but not wet.
If the temperature gets hot - 20°C+ then be concious of humidity - for
high temp and low humidity can dry out the leaves especially in
sunshine (something I can account for)
Cranberries do not seem to have a high nutrient requirement. Be aware
that if the pH is out of range the plant my exhibit nutrient
deficiencies.
Two good books - Jennifer Trehane "Blueberries, Cranberries and other
Vacciniums"
Clive Simms - "Nutshell guide to Cranberries"
Regards
Clifford