Posted: 31/01/2015 at 12:54
If they are as easy as Gladiolus byzantinus (or whatever it is called now) then they are dead easy. They do not need cold stratification, but keep the seed pots cool, rather than hot. Germination should take place in spring. Seedlings look like grass. Grow on in the seed pot, feeding with half strength liquid feed for the first year. Then when the leaves start to go yellow, stop watering and keep the pot somewhere cool but frost free. Repot the whole thing the following Spring in a deeper pot with fresh compost and grow on for another season. If the corms are then big enough to separate, do so and grow on until they reach flowering size. Takes about 3 to 4 years.