5 ms·The best time to plant a tree was 15 years ago. The second best time is now.by serial_dev 6mo agoThe best time to plant a tree was 15 years ago. The second best time is now.dotcoma 6mo agoThe best time is now, but for solar.pfdietz 6mo agoThe best time to have given up on new nuclear construction was decades ago. The second best time is now.