A method of selecting a daily window of time during which designated female parent plants are ready for target cross pollination with designated male plant pollen and thereby suitable for the production of hybrid seeds of interest, wherein the designated female parent plants are selected from the group consisting of wheat, barley, soybeans, and rice, wherein the designated female parent plants are exposed to undesired pollen, said undesired pollen being: a. pollen from male components of said designated female parent plants, which pollen has the potential to cause unwanted self-pollination of the designated female parent plants; and/or b. pollen from unrelated plants of the same species carried by the wind, insects, and other factors in nature, which pollen has the potential to cause unwanted cross pollinations relative to the target cross pollinations the method comprising: establishing that female components of the designated female parent plants are receptive to receive pollen; and selecting the daily window of time in respect of the designated female parent plants, wherein the daily window of time that is selected: i. is before the part of the day during which the undesired pollen begins to be shed, for example during the early to mid-morning and/or at night; ii. is before the part of the day after which daily dew dries; and/or iii. is at the very time at which female components of the designated plant parts first become receptive to receive pollen. wherein the designated female parent plants are selected from the group consisting of wheat, barley, soybeans, and rice, wherein the designated female parent plants are exposed to undesired pollen, said undesired pollen being: a. pollen from male components of said designated female parent plants, which pollen has the potential to cause unwanted self-pollination of the designated female parent plants; and/or b. pollen from unrelated plants of the same species carried by the wind, insects, and other factors in nature, which pollen has the potential to cause unwanted cross pollinations relative to the target cross pollinations a. pollen from male components of said designated female parent plants, which pollen has the potential to cause unwanted self-pollination of the designated female parent plants; and/or b. pollen from unrelated plants of the same species carried by the wind, insects, and other factors in nature, which pollen has the potential to cause unwanted cross pollinations relative to the target cross pollinations the method comprising: establishing that female components of the designated female parent plants are receptive to receive pollen; and selecting the daily window of time in respect of the designated female parent plants, wherein the daily window of time that is selected: i. is before the part of the day during which the undesired pollen begins to be shed, for example during the early to mid-morning and/or at night; ii. is before the part of the day after which daily dew dries; and/or iii. is at the very time at which female components of the designated plant parts first become receptive to receive pollen. establishing that female components of the designated female parent plants are receptive to receive pollen; and selecting the daily window of time in respect of the designated female parent plants, wherein the daily window of time that is selected: i. is before the part of the day during which the undesired pollen begins to be shed, for example during the early to mid-morning and/or at night; ii. is before the part of the day after which daily dew dries; and/or iii. is at the very time at which female components of the designated plant parts first become receptive to receive pollen. i. is before the part of the day during which the undesired pollen begins to be shed, for example during the early to mid-morning and/or at night; ii. is before the part of the day after which daily dew dries; and/or iii. is at the very time at which female components of the designated plant parts first become receptive to receive pollen.