A computer implemented method for controlling of a growth cycle for a plant of a predetermined type comprising chlorophyll arranged in a controlled environment, to enable said plant to reach a desired growth status , said method comprising the steps of: defining a set of growth states (202-209), each of said growth states being a state of said growth cycle where a selection of property values of respective detectable properties of said plant is within a defined range, and each of said growth states being associated with a plurality of growth regimes (211-213) defining control of an artificial light arrangement for adjusting light spectral composition and/or light intensity in order to modulate or improve the growth of said plant ; and when in a present growth state: determining (S3), using input from a plurality of sensors arranged to acquire a detectable property indicative of the growth status of said plant , a current growth status of said plant, wherein said current growth status comprises a set of said property values of respective detectable properties of said plant , and selecting (S8, 313) a best growth regime of said plurality of growth regimes and controlling said artificial light arrangement according to said best growth regime , wherein the step of selecting (S8, 313) a best growth regime in said present growth state is based on said desired growth status , said determined current growth status , and on previously selected growth regimes in previous growth states of said plant . defining a set of growth states (202-209), each of said growth states being a state of said growth cycle where a selection of property values of respective detectable properties of said plant is within a defined range, and each of said growth states being associated with a plurality of growth regimes (211-213) defining control of an artificial light arrangement for adjusting light spectral composition and/or light intensity in order to modulate or improve the growth of said plant ; and when in a present growth state: determining (S3), using input from a plurality of sensors arranged to acquire a detectable property indicative of the growth status of said plant , a current growth status of said plant, wherein said current growth status comprises a set of said property values of respective detectable properties of said plant , and selecting (S8, 313) a best growth regime of said plurality of growth regimes and controlling said artificial light arrangement according to said best growth regime , wherein the step of selecting (S8, 313) a best growth regime in said present growth state is based on said desired growth status , said determined current growth status , and on previously selected growth regimes in previous growth states of said plant . determining (S3), using input from a plurality of sensors arranged to acquire a detectable property indicative of the growth status of said plant , a current growth status of said plant, wherein said current growth status comprises a set of said property values of respective detectable properties of said plant , and selecting (S8, 313) a best growth regime of said plurality of growth regimes and controlling said artificial light arrangement according to said best growth regime , wherein the step of selecting (S8, 313) a best growth regime in said present growth state is based on said desired growth status , said determined current growth status , and on previously selected growth regimes in previous growth states of said plant . <EOS>