@Region Philbis,
since cilantro seed is cheap, yu can use the old adage for getting plants to grow. When you plant you plant enough seeds
One seed for the worm
and one for the crow
another to wilt
and one to grow
When I plant cilantro, I usually make a short row because cilantro gets spindly after a few days . It goes from being a parsley looking leaf to a dill like leaf as the flowers and seed pods begin to show.
It has its best "soapy" taste when the leaves are broad
SO we start a row every week or so right until about mid September and it gives us cilantro all spring and summer.