I wonder if this would work. Whenever I get any kind of berry stains on fabric I just boil some water and pour it over the stain from a several inches away. Don't know what holding the tea kettle so high has to do with it (more pressure?) but it always works - in just seconds.
Try purposely getting the geranium stain on some scrap fabric and see if it words first.

BOILING WATER WORKS!

I am just reading how to get rid of red geranium stain since I just got done making a mess of my white linen shirt and khaki capris thinking that I wouldn't get them stained just by cutting a few flowers. Wrong! I first tried cold water, no luck. Then I tried "Dawn", no luck. Then laundry detergent, no luck. I then "googled" the problem for a solution. I read "music teacher's" hint and I doubted it because I always heard that heat sets the color not remove it. At this point I had nothing to lose. I couldn't believe it! It worked like magic. Wished I had tried that first thing.

I got red geranium on raj green un sealed stone flags as I was laying them and thought omg what a mess, there was red blotches everywhere, I tried all the ideas suggested, from hot water , cold water, fairy liquid, swarfega, to brick acid, bleach, caravan cleaner and black stain remover, none touched it, then searching through the hut found costic soda crystals and...... awesome just disappeared.....

I wanted to thank Musicteacher, who saved my new, one week old carpet.

We brought a geranium in due to frost and the petals stained the carpet. Instead of trying chemicals i thought boiling water was a good try.

It was amazingly fast. Thank you, thank you!

Music Teacher is right!!! Boiling water even works on old geranium stains! Thank you, Music Teacher.