I would guess you'll need more juice… a lot more juice. Honeydew is pretty subtle, so even though you are using a light/clean base beer you’ll probably need something like 5+ pints to get a moderate flavor. You can always add half, taste, and then add more if needed. That will also necessitate adding it a week or two before bottling to ensure you don’t end up with over carbonated beer.
Just one note on the base beer, I would add the honey after you chill to ~170 or so (although I’ve had the best luck adding it after primary fermentation). Good luck.