The young plants should be planted about 4" apart where you want them to grow as they do not respond well to transplanting.

They should be in full sun in good draining soil.

Add compost and mulch to ensure that the young plants don’t dry out, and plant an area every 3 or 4 weeks for a constant supply throuighout the growing season. (Of course that depends upon how much you use coriander leaves)

The leaves may be harvested when they are about 6 inches high.

The seeds should be harvested when brown, prior to dropping. The plants should be cut off at the base and hung upside down in paper bags for further drying.

Check out growing in a herb spiraland, if you do, note that coriander should not have been planted in such close proximity to the fennel as it inhibits seed set in fennel.

Hopefully we all learn from our mistakes...