The tulips are red, a darker crimson towards the stem, as if they have been cut and are beginning to heal there'
Ch 3 Pg 18: Tulips add to colour motif/fertility. Suggestive image as Atwood draws on connotations of growth, flowering, fertility, youth, menstruation.
The fact the tulips are in the garden is a reference to the way the Handmaids have been cultivated for a purpose against their natural instincts.
Links to Offred, as although life has been taken from her she may be beginning to heal