All 3 Uses

cultivate
in
Washington's Farewell Address
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One method of preserving it is to use it as sparingly as possible, avoiding occasions of expense by cultivating peace, but remembering also that timely disbursements to prepare for danger frequently prevent much greater disbursements to repel it, avoiding likewise the accumulation of debt, not only by shunning occasions of expense, but by vigorous exertion in time of peace to discharge the debts which unavoidable wars may have occasioned, not ungenerously throwing upon posterity the burden which we ourselves ought to bear.†

cultivating = developing, growing, or preparing to grow crops
Observe good faith and justice towards all nations; cultivate peace and harmony with all.†
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cultivate = develop, grow, or prepare for growing crops
In the execution of such a plan, nothing is more essential than that permanent, inveterate antipathies against particular nations, and passionate attachments for others, should be excluded; and that, in place of them, just and amicable feelings towards all should be cultivated.†

cultivated = developed, grown, or prepared for growing crops

Definitions:

(1) (cultivate)
enhance growth or development
in various senses, including:
- to grow crops or prepare land for them
- enhance a relationship -- especially for a purpose
- develop discernment (better recognition of differences) in taste or judgment
- to grow a culture in a petri dish
(2) (meaning too rare to warrant focus)
The word form cultivator is commonly used to describe a machine used to prepare soil for growing crops.