How do I take the bomb flower to Dodongo's Cave?

Solution 1:

You do have to throw a bomb flower over a fence; most likely, you are trying from the wrong place.

You aren't just trying to get it from anywhere that looks like it might work; there is a specific place you need to go to as part of the main quest/story/mission in order to open the cavern. It is high above the cavern entrance; you throw a bomb flower way down from above.

You can get to this spot by continuing to follow Death Mountain Trail up. The space should be somewhat obvious when you see it; there is a bomb flower in a very specific space directly high above the Cavern entrance.

You can see the space you need to be near the start of this video, at 0:40: