That's very difficult to get a delegation from other people because they expect something in return. They may delegate to you if you do a good job curating content or writing awesome posts, or they might delegate to get back interests from you, but I don't think they will delegate to help you improve your garden. The best way to do it is to buy the delegation and I suggest blocktrade.us. If you want to finance a project, like your garden, you might want to look at crowdfunding with fundition.io. i have 2 posts about them.