Fifteen people took part in the demonstration in the early hours of this morning at the warehouse in Swallowfield Way, Hayes, and three arrests were made.
The protestors say the company, which exports agricultural goods, is operating unlawfully by growing flowers and produce in illegal settlements on Palestinian land.
The feminist group are from across London and do not belong a specific organisation.
Charlotte Murphy, one of the protestors, said: "Obviously we wanted to make this protest in the run up to Valentine's day as flowers are a key part of Agrexco's exports. We understand they have an extra 13 flights just to bring in flowers here during this time.
Eva Cerne, another protestor, said: "The conflict obviously makes me angry and the worse thing is they say Israel is a democratic country but with all the dead bodies I've seen on video footage they are not democratic at all."
The protest has now been broken up and the people involved moved on peacefully.