The seasons of the year are produced by the tilt of the axis of the Earth. The earth's tilt on its axis causes the hours of daylight to shorten during the cooler months of the year. This affects the changing of the seasons and indirectly affects plant growth, as a plant's ability to survive and flourish will depend on the area where it is located and the relative heat or chill of that region and the region's exposure to sunlight. ("Will the equinoxes and solstices switch places in 13,000 years because of the precession of the Earth's rotation axis?" 2005) "Summer in the northern hemisphere occurs at the same time as winter in the south, and vice-versa." ("What Causes the Seasons?" 2005) The precession of the equinoxes of the Earth is a motion that causes the axis of the Earth's rotation to remain fixed at an angle of 23.5 degrees. The vernal equinox heralds the beginning of spring and the growing season for the northern hemisphere because of the nature of the earth's motions in relation to the sun. ("Will the equinoxes and solstices switch places in 13,000 years because of the precession of the Earth's rotation axis?" 2005) .

             However, in terms of polarity and the magnetic fields of the earth generated by the earth's movement, no study has conclusively shown that the earth's changing magnetic fields directly affect plant growth at the levels found in the natural environment, although magnetism can affect plant growth in artificially generated conditions of labs. However, the fields found in nature at the scale of a backyard garden, are simply not strong enough to make a difference in rates of plant growth. ("Does the Earth's magnetic field daily changes affect plant germination and growth?" 2005) Plants may change the direction of their growth to face the apparent orbit sun, if this is required for the particular plant species' growth. If placed in an area that is lacking in adequate sunlight, they may fail to grow, or if they are planted in a season that is too cold and does not generate enough sunlight, but the rotation itself is only one reason for the cause of the plant's failure to thrive.