1. Go to the 'Plant database'
2. enter the name of your plant in the search box
(I found your plant here: Tall Bearded Iris (Iris 'Bayberry Candle')
3. Scroll down to 'adding actions' and click on 'upload a photo'. it will go into a queue to be app[roved by admins.
For purchases it's best to go to the 'classified and group buys' forum and post your request there.