Weekend Warriors "unlimited" energy tips

[HuckleTown]

First time doing WW. my first 10 minutes went pretty well. With 6 minutes left I planted more willows to get the first grow during unlimited. Mostly worked. Some weren't watered before timing out. So I used 17 of my new 40 energy to water them. I planted more.

My problem came 5 minutes later. I had 23 energy. Left the game, came back to water some willows, I only had 7 energy. Sad. I should still be able to get the next 10 minutes before time runs out as long as I grow most of my willows.

WOW it just happened again, I finished my last 10 minutes. Waited 2 minutes to water a few willow trees. Used 15 energy, then the game resets and I have 0 energy!