Callas, especially colored ones, benefit from water and temperature management.
Results are more likely to be satisfactory if a preventative fungicide drench is used.
Benomyle or Captan would be good choices. If you do not wish to use a drench, use
new pots, sterile media, and new saucers. If you choose to use old containers and
saucers, disinfect in a Chlorine bleach solution for 20 minutes. Allow pots to air-dry
so that chlorine will dissipate before potting.
Selection of a well-drained potting medium with good soil porosity is important.
Medium should have a PH of 6-6.5 and not exceed 40% of peat. If you suspect that
The medium you intend to use is not porous enough add Perlite.
WATERING & TEMPERATURE
Within 24 hours of planting the bulbs 1 ½ In. deep in moistened media, a fungicide drench for prevention of phytophthora and rhizoctonia can be applied. Put enough on
to wet all of the soil in the pot if possible. Thereafter, water very sparingly until foliage is
well developed. After that keep soil moist, but not saturated.
Start pots at warm temperatures (70-75 degrees) until well emerged. After that,
60 degree nights and 65-70 degree days are about right. High temperatures speed
flowering but produce soft floppy plants. High light and low temperatures (55-60 degrees) will improve flower color and plant habit.
slightly low on phosphate. Follow package directions.