When to Plant Indigo Seeds

Q: I have seen in many articles that that Indigo Persicaria Tinctoria is sensitive to frost. When should I plant my indigo seeds?

A: I live in Los Angeles and I germinate my indigo seeds in late December/January under a grow-light and transplant in February. However there is NO frost in Los Angeles. If there is even a tiny frost, it will kill the plants back to the root (or thick stems if the plant is more mature). I'd recommend waiting to transplant until there is zero chance of a frost. Seeds could be planted 6-8 weeks before transplant.