Big sized Gladiolus species in pots

Alberto Castillo
Fri, 13 Sep 2002 18:07:25 PDT
Dear Jim:
               Subtropical and tropical soils are extremely well drained, 
mostly acid and rich in iron and aluminum. I would use a mix of 1 part 
coarse perlite (sieved to exclude dust), 1 part commercial compost, 1 part 
crushed rock . For big sized species like saundersiae, oppositiflorus, 
crassifolius, daleni, garnieri, etc. a 5 gallon container would be enough 
for the deep planting necessary for successful cultivation. Of course, 
several good sized drainage holes are a must.  Heavy fertilizing must be 
avoided but monthly waterings with a very dilute iron sulphate solution have 
proved very useful.

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