Bloom: Fill
Hint 1
Observing the final state, you must fill the two gaps with the wood. So you must pile up them, to push de second on to the corner.Hint 2
Which purple flower you can use to elevate the wood? Note that you must be on the top layer too.Hint 3
If there's two flower, you can deduce that one will elevate you and the other will elevate the wood.Feel free to ask more hints ^-^