This is not just for iris but for any of the plants. But I figgure maybe many of you don't look at the Site Talk Forum so might not know about this.
Here is a link to Trish's post in the Site Talk Forum were she said she will give 5 extra acorns for each comment made in the database for TODAY ONLY.
The thread "Plant Comments bounty" in
Plant Database forum
So go to the plants tab, start looking at all the immages and get your comments in. I did! A fabulous way to add acorns or start your collection if you don't have any yet.