Troubleshooting
Mignonette problems — and how to fix them
Mignonette (Reseda odorata) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Premature bolting in heat
Temperatures above 27°C trigger rapid bolting, short flowering windows, and loss of fragrance. Sow in early spring for cool-season flowering, or time autumn sowings in mild climates (zones 8–10) for winter and spring blooms.
Poor transplant survival
Mignonette has a taproot and strongly resents root disturbance. Direct sow in final position after last frost. If starting indoors, use deep biodegradable pots and transplant at the 2-leaf stage without disturbing the root.
Aphid infestations
Soft stems and foliage attract aphids, particularly in spring. Inspect regularly and use a strong water jet to dislodge, or apply insecticidal soap. Avoid high-nitrogen feeding, which produces the lush growth aphids prefer.
Prevent mignonette problems before they start
Most mignonette issues are care-mismatch, not bad luck. Dial in the basics:
Mignonette problems — FAQ
Why is my mignonette premature bolting in heat?
Temperatures above 27°C trigger rapid bolting, short flowering windows, and loss of fragrance. Sow in early spring for cool-season flowering, or time autumn sowings in mild climates (zones 8–10) for winter and spring blooms.
Why is my mignonette poor transplant survival?
Mignonette has a taproot and strongly resents root disturbance. Direct sow in final position after last frost. If starting indoors, use deep biodegradable pots and transplant at the 2-leaf stage without disturbing the root.
Why is my mignonette aphid infestations?
Soft stems and foliage attract aphids, particularly in spring. Inspect regularly and use a strong water jet to dislodge, or apply insecticidal soap. Avoid high-nitrogen feeding, which produces the lush growth aphids prefer.