Spanish Mustard prefers consistent moisture. Water regularly, allowing the top 2-3 cm of soil to dry out between waterings. Avoid overwatering, which can lead to root rot.

In hot, dry weather, more frequent watering may be necessary to keep the soil evenly moist and support vigorous growth.

Pruning Spanish Mustard is primarily for harvesting. Regularly harvest leaves to encourage bushier growth and prevent the plant from becoming leggy.

If the plant begins to bolt (flower), trim off the flower stalks to extend the leafy harvest period. Remove any dead or yellowing leaves promptly.

Spanish Mustard is easily propagated from seeds. Sow seeds directly into the garden in early spring or fall, or start them indoors 4-6 weeks before the last frost. Seeds germinate quickly in warm, moist soil.

Transplant seedlings carefully to avoid disturbing the roots.

Repotting is generally not necessary for Spanish Mustard, as it is often grown as an annual for its edible leaves. If grown in containers and the plant becomes root-bound, or if you wish to overwinter it, repot into a slightly larger container with fresh potting mix in early spring before active growth begins.