is coriander frost resistant
1 The seeds will germinate in 2 to 3 weeks typically. 2  Because cilantro is frost resistant, it can be planted quite early in the spring, even in Northern climate zones. 3  Most varieties of cilantro/coriander grow to about 12 to 15 inches in height. When it gets hot in the summer, cilantro will often âbolt.â Bolting means it goes to seed. 2  You can plant âslow boltingâ varieties in the shade of taller plants in hot climates to keep it from bolting, unless you are growing it specifically for coriander.