Base section 10 includes a circular bottom wall 18 to the peripheral edge of which is fixed a cylindrical side wall 20 to form a housing for receiving fertilizer sap. A perforate support disc 22 is mounted within cylindrical side wall 20 in spaced relation to both the upper and lower limits thereof, but in closer proximity to the top of the base section. A valve 24, of conventional construction, mounted in cylindrical side wall 20 proximate bottom wall 18, permits sap fertilizer within the base section to be readily drawn off when desired.