Even Kakashi could lend a hand. He might not seem like the gardening type at first, but he has a lot of knowledge. He could help Naruto protect the garden from potential threats, like thieves or pests that might be more dangerous in the ninja world, using his ninja skills.
In the 'naruto grows a garden fanfiction', it could be that Naruto starts the garden as a way to relax. He might plant different types of flowers and vegetables that are native to the Hidden Leaf Village. As he takes care of the garden, he discovers that the plants have a connection to his chakra, and he can use his chakra to make them grow faster.
In a 'Naruto Needs Help' fanfiction, Naruto could get help from unexpected sources. The tailed beasts themselves could come to his aid. Since Naruto has a connection with Kurama, the other tailed beasts might sense his distress and offer their power. Also, characters from other villages. For example, Killer Bee could teach Naruto some new techniques related to the tailed beasts' power, or Temari could use her wind techniques to assist in a battle where Naruto is outnumbered.
Another possibility is that the antagonist could be a dark entity that is awakened by Naruto's new power. The wings might have some sort of connection to an ancient evil, and this entity wants to use Naruto's wings to spread chaos and destruction across the ninja world.
Iruka could help. He's always been there for Naruto. He might know some old tales about mysterious eggs and give Naruto some useful tips.
Tsunade could play a crucial role. She could use her vast knowledge of resources and economics to secure the funds and materials needed for the fleet. Jiraiya, if he were still alive, would bring in his worldly knowledge and connections from his travels. He could help Naruto find rare and valuable materials from far - flung places for building a truly remarkable fleet.
Sasuke could be one to help. Given their history and Sasuke's intelligence, he might contribute some knowledge about energy manipulation which could be useful for the lightsaber's power source.
I think Hinata would definitely visit Naruto's garden. She has always been interested in Naruto, and his garden would be a wonderful place for them to spend time together. Also, the senseis like Kakashi might drop by. He could give Naruto some advice on how to manage the garden in a more efficient and unique way, maybe even sharing some knowledge about plants that could be useful in ninja training.
Sasuke could be one of the people to help. He has a deep understanding of weapons and combat. He might offer some advice on how to make the blade sharper and more effective in battle.
Sakura could be a great help. Her medical skills could come in handy if Naruto gets injured during his battles or difficult encounters while trying to free the tailed beasts. Also, her combat skills have improved over time, so she could fight alongside Naruto.
Kakashi could also be a great help. With his vast experience and wisdom, he could guide Naruto in understanding the implications of becoming a new species. He might be able to teach Naruto how to control any new powers that come with the transformation and how to deal with the potential social isolation.