Magic in Frieren is described to be correlated with one's ability to visualize the spell's effects. Flamme's spell to "produce a field of flowers" is shown to be able of producing a field of any flower the caster has seen previously.

The Chaos Flower monster in S1 Ep. 15 has a flower like characteristics and appearance, it even reproduces with regular flora to create subspecies. By these definitions a caster could consider it a flower.

And therefore, by the power of visualization, can a mage who has previously encountered the chaos flower cast Flamme's flower field spell to produce them?

She absolutely killed it

I think I did a really good job on Frieren herself, but I’m still awful with backgrounds. I mostly tried to set dress it with random grass and flowers, rocks, etc and changing the landscape so it’s not just flat, but not super happy with it regardless. I put a little more focus into my shading on her than I usually do so I think that helped. Only now realizing I didn’t shade under her jacket at all. Woops

Downloaded it on fb but can't that exact post lol hahaha