A flower stem insertion device for forming flower bouquets in accordance with the present invention includes an outer portion fabricated from a relatively flexible polymer material and having a plurality of apertures disposed to ultimately configure a preselected flower bouquet when stem portions of preselected flowers are inserted through the apertures. The flower stem insertion device further includes a deformable inner portion fabricated from Floral foam configured to cooperate with the outer portion such that when the stem portions of the preselected flowers are ultimately inserted through the apertures, the stem portions penetrate the deformable inner portion a predetermined distance sufficient to maintain the position of each preselected flower relative to the outer portion.