A living wall with secrets to keep, Nature's boundary, a haven for sleep. Trimmed and tidy, a sculptor's delight, Guarding gardens from morning till night.

I can make sure nothing leaks or swim in the ocean

Tranquil, serene, Top water sunlight gleams. Extending threaded mimicry, To catch gaze, from those it feeds. Mostly, patience is the way. If brought, it feeds you for a day. But when the knowledge is instilled, You’ll know from food, you’ll never stray.

When fair and foul dost dance upon the shore, Thee find'st a force that ever waxes more. Dost mark the moon, her beckoning embrace? An unseen pull on waters' restless face.

I’m not born of clouds, yet I choke the sky. I turn sunlight sick and cities gray. What am I?