with MTBs I am working with diploids. You can see by the photos that crossing a yellow & a purple brought out 4 different colors. Those of you working with tet TBs can realize multiple colors. I could use pollen right away in that cross. When working with some plants (I. pumila crossed on tet MTB) I have to refrigerate because of different time of bloom. I use small envelopes in a container using descant used for flower arranging. I ran out of it & not having a place for replacement substituted cornstarch this year. Not sure if it worked.
In a BB cross (tet) lavender x yellow & purple X yellow one a species (Annikins) produced the white Hi Buddy. I was not expecting that. Now white is labeled 'absence of color' or it could mask colors so not sure what is hiding there.