Crops will start growing at about 7am (Game Time).
Crops in watered pot would definitely grow a stage every day while those in dry pot have less chance.

Season & Greenhouse

Season is now an important part of StardewValley Farming System. Crops only grow in a suitable season and inproper seasons will make crops into a dead stage. You can use greenhouse glass to allow them to grow all year.

Fertilizer

There are five templates of fertiziliers:
SpeedGrow: Crops have a small chance to grow two stages at a time
RetainingSoil: Pot have a small chance to retain its water after crops grow
QuailityCrops: When haveresting, players have a higher chance to get high quality crops.
YieldIncreasing: When haveresting, players have a higher chance to get more crops.
Gigantic: Crops have a higher chance to be gigantic.

Sprinkler & WateringCan

Sprinkler is a semi-automatic way of watering pot. You can add water to sprinkler with water bucket or watering can. Max storage and range can be customized.
Watering-can also has its max storage and effective range. 1x1 1x3 3x3 and even 9x99 is supported!

OverWeight

If configurated, crops have a very little chance to be OverWeight(gigantic) after they are ripe.

Quality

Crops have three qualities, if you don't want this feature just delete it in config. Quality is determined by the fertizilier players use and their luck!

Harvest Repeatedly

If configurated, crops can be harvested repeatedly and return to a specified stage.
This is useful for crops like grape.

Crow and Scarecrow

Crops have a little chance to be eaten by a crow.
A scarecrow would help the crops free of their attacks in one chunk.

Highly Optimizied

Crops growing progress is distributed evenly to the whole day so there would not be large amount of blocks replacement at the same time.
Crops' data would be removed from file as soon as they are ripe, which would not affect your server performance in the long term.