Posted: 21/08/2012 at 10:31
Lots of questions there. First of all first year Irises do not need splitting up. Next year maybe, if the rhizomes are overcorwded. Resons for non-flowering are many, but take your pick from, 1 too young, 2 underfed and 3 lack of sunlight on the roots last Summer.
2. Feed with Maxicrop about now and Tomato type food in early Spring.
3. Move to a sunnier place. Or if the rhizomes are overshadowed or facing the wrong direction, change that. They should always be planted sp that the rhizomes are exposed to as much sun as possible.
Next, o;d flowering stems. Cut the stem itself off back to where it emerged from the leaves. Clean up and remove and dead or dying leaves and you can if the tips are going brownl cut of the tops of the leaves, but to no more than half their length. The plant needs them for food production.
Gladiolus bulbs may be left in ,if you are on a well drained sandy soil and they were planted deeply enough for frost not to reach the corms, otherwise dig up and store over winter for replanting in Spring.