As mentioned before they tend to survive and multiply if grown in site having good drainage with sun available from morning till noon and then shade. Its altogether a different scenario if you want to grow them in pots only. Possible options that may work.by Asim_Nawaz »
Last Year I will grow Dutch Iris bulbs, after bloom bulbs will not survive. Any tips regarding to survive Dutch Iris bulbs for next season...
1. When their bloom ends take them out of the pots and place them in plastic bags with holes known as onion bags in a room having good air circulation from May till September.
2. Let them remain in pots and withhold watering when the dormancy sets in and consider watering only when new foliage starts emerging.
3. Take them out of the pots when the dormancy sets in May and place them in refrigerator till end of August and then place them in pots.
You will have to experiment and draw your own conclusions based on these options....