Iris bulbs should be planted about three times deeper than the size of the bulb. So, if your iris variety is 2 inches tall, plant it 6 inches deep. Although some types of irises will produce blooms in ...

but it can work with other dwarf iris species, too. "A period of cold temperature is required to induce the plants to flower," he says. "This can be done by holding bulbs at temperatures between 35 ...