Give yourself some time
Some facts you won't necessarily like. Just like a seed can't grow into a full grown tree no matter what "hack" you use, it's going to take constant exposure to sunlight, water and air AND TIME!!! You can't rush it. You can only make the environment as ideal as possible, and stay consistent with that. At best, the plant will grow only as fast as nature allows it to. Let time take its course. Don't rush it.