Just got this after a bunch of tries, unfortunately don't have a video but I can explain what worked for me. I think it's different enough from the other solution to be worth posting.
You get this on Nursery 6: Bulb.
Right at the start, at the first jump where you plant the first bulb, lose about half of your liquid by not putting it past the jump & holding left until it vanishes. No joke. This is the key to getting this; with only half your liquid to manage it'll be much easier.
Jump all the rest, knock down the next bulb, push it left, and let it all fall. Don't let any burn in the red death by the hanging loop. Using the curve on the left, swish left and right until all the liquid is to the left of the bulb. Very carefully push the bulb off the right edge without letting a single drop fall.
Wait patiently for the flower to grow then gently pour some of your liquid onto it, swishing it left immediately after. Don't let any fall off to the right side of the flower... you only need enough to go left to keep from losing due to volume. Hold left so the part you didn't bring down vanishes.
Finish up the level and it should pop right before the end.