"This one is a teensy bit difficult to analyse but I'll give it my utmost best. Alrighty then, my analysis. Quite like the other one, this technique can effortlessly be deduced. The fact that it has no handseals starts like this chain of more reasons why it is but an illusion, let me go more into detail... Lets say you induce this illusion on me, I'd notice you didn't do any handseals and that im all of a sudden in a flower bud, where did it come from and how am I all of a sudden in it? This alone is enough to make me realise its an illusion,ofcourse you could also add not being able to feel the bud that you are in and break out with ease.
Anyways moving on to the part where the bud explodes, to be honest I personally would just die then and there because I would not be able to make logical sense of it and break out. Now, because im in the bud I wouldn't know if my opponent maybe used a bomb to make it explode or some other method as I wouldn't be able to see him. I cannot say break out before the explosion happens because one does not know exactly when it happens or how long it takes to happen but to be on the safe side rather break out as quick as you can. This part of the illusion to me is quite a big help(depending on if you're the one inducing the Genjutsu or not).
The fact that the Genjutsu is very easy to do is also a huge advantage because you could be in a tight situation and this, would be quite useful in order to help you escape your predicament.Overall to me this is a great technique and would come quite in handy during a battle.