Preferably 50% or
higher; however, they will tolerate low levels with no harm.
Watering:
Bring the soil to
a state of visual dryness between watering. They need a period of
dryness between waterings to keep their roots healthy.Letting them wilt a little does no harm.
Fertilizer:
Fertilize
with ½ tsp./gallon once a week when in active growth and temperatures
are warm.Discontinue in
winter especially under short days and cool night temperatures.May need to add iron chelate to fertilizer if signs of iron
chlorosis appear (interveinal yellowing on juvenile growth).
Pruning:
Repot once plant
has completely filled the pot.Prune
in late winter or early spring or any time growth is excessive.Do not prune off all the foliage, especially when not in active
growth. Allamandas recover quickly when some foliage is left.
Insects and
Disease:
Some
susceptibility to white fly and occasionally spider mite late in the
growing season.Highly
susceptible to root disease.
Comments:
Successful
growing of Allamandas is related to warm temperatures and high light.The greatest challenge in their culture is keeping a healthy
root system.The varieties
A. ‘Golden Butterfly’ and A. nerifolia have the greatest
resistance to root diseases.
