I’m growing these from Premier Seeds Direct this year - they’ll be my patio plants for the kids, with my ‘proper’ tomatoes in the greenhouse at the allotment. I haven’t found any indication they’re F1 - where were you looking?
Another confusing thing is that PSD have them listed as determinate while some other suppliers seem to suggest they’re indeterminate
. I have a feeling ‘cerise’ may not really be a defined variety, so one supplier of seeds called cerise may well be selling a different variety from the next, as it is just the French word for cherry! That’s just my WAG though…
OB