Don't waste your money on anything less than quality soil as this just adds to grow time as well as the number of times needed to be watered.
I most times can't remember the growing times as is the same with most new players. There are a lot of players give up after crops die too often. Also I have gotten a lot of miss information from players who say to water at odd hours. The watering time is within 24 hours. Right now wiki says to just give the crop a pull to check if they are ready to pick. This will not do as a lot of players can't just tug on crops every few hours. The Farmers Almanac only tells how long since planted and how long since last watered.
BTW Quality Soil sold in Cubit Store is actually called Great Soil but for some reason CC doesn't really care to make changes that don't affect their economy.
All times listed below are in Quality Soil.
1. Tomatoes - 30 hours
2. Potatoes - 45 hours
3. Corn - 60 hours
4 Eggplant - 80 hours
5. Wheat - 120 hours