Plant growth is simulated using realistic models from agriculture, horticulture and botany. You can use different soils, fertilizers and irrigation techniques to improve your plants' well being and increase your harvest. See section science and learning.
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Detailed plant informations
As a plant grows from a sappling to the harvest the demand for resources changes and you should choose the amount of water and soil accordingly. You don't have to do it all over again: You can choose to automate it, using a successful method, you've previously discovered. Or you can try a new approach.
The environment plays an important role as well. A mild climate provides a good amount of rain, but some plants need to be sheltered in a greenhouse. A hot climate requires heavy use of irrigiation, but some plants thrive due to the increased sunlight.
On Mars your whole garden is a giant green house and you even have to use artificial light and water recyclers to maintain the system.
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