Human urine with ash can be a perfect fertilizer that can bloom a pivet hedge. It's a good fertilizer because it's already cheap and an environment-friendly fertilizer.
Composting is a good way to fertilize nearly any type of plant. My favorite types of composting are banana peels, egg shells, coffee grounds, and some type of manure.
Organic fertilizers with lots of nitrogen work great. Also some starter fertilizers can be a good alternative. Although these hedges don't need a ton of nutrients they grow great with the basics at least.
