30 days for leaves; 45 for seeds. Slow to bolt and very fragrant, this richly flavored plant is the source of fresh leaves (cilantro) and seeds (coriander). You can begin picking the foliage leaf by leaf as soon as one month after transplanting it into the garden, or let the whole plant mature, pinching off flower buds, and harvest it all at once. For coriander seeds, let the blooms open, then tie a paper bag around them and shake it periodically, until you hear the loose seeds rattling. Easy! Packet is 100 seeds.