Item Package Quantity:1 Justincase Seeds Cilantro Seeds for planting your own home vegetable garden! Plant now or save for later. Cilantro doesn’t like hot weather. Cilantro growing in soil that reaches 75 F+ will bolt and go to seed. This means that the ideal cilantro growing conditions are cool but sunny. Preferably grow cilantro where it will get early morning or late afternoon sun, but be shaded during the hottest part of the day.