Once you place the plant at your house, it can't be returned to inventory. You can reposition it, though.
The newly placed plant is the Small size. It can grow into Medium and then Large sizes.
To water the plant, just click on it and the water level is refilled.
The water level will drop to one-half after 4 hours.
If not re-watered, the water will empty out after 14 hours.
The plant will wither if it's not watered within 24 hours. It will also drop a size, if it's not already small.
After another 24 hours without water, it will drop another size, if it's not already small.
Your friends can visit your house and help you keep your plant watered. Doing this will give them 50 coins per watering.
Friends can water a plant every 15 minutes.
Players can water 25 plants that they don't own, in every 24 hours.
If your plant is kept properly watered for 24 hours, then you will be able to harvest coins from it.
When placed, the plant is in the Bare state.
This transforms into the Budding stage after 12 hours.
When your plant Blooms, every 24 hours (if kept watered), you can click on it to receive that day's crop of coins.
500 coins from small plants.
700 coins from medium plants.
1,000 coins from large plants.
After 30 days, the plant enters the last stage -- Expired.
Once this happens, it can't be watered or harvested any more.
As the plant owner, once it has expired, click on it one last time.
It will be put back into your inventory as a Golden Jackpotted Plant.
This gold plant can be used as a decoration or can be sold to gain a final 2,500 coins.
Beginning sometime in June, 2010, plants will have a Friend Counter. For each friend that waters your plant (up to 25), you will receive a 1% coin bonus when you harvest.
Friend Counter
Number of Friends Watering Your Plant
Amount of Coins Earned by Plant Size
Small
Medium
Large
1
5
7
10
5
25
35
50
10
50
70
100
15
75
105
150
20
100
140
200
25
125
175
250
In April, 2011, all players received a free Jackpot Plant as a welcome back gift.
In June, 2011, all players received a second free Jackpot Plant, most likely as a gift for playing the game for so long.