Water thoroughly when the top 2-3 cm of soil feels dry. Sideritis hyssopifolia prefers well-drained soil and is moderately drought-tolerant once established. Avoid overwatering, which can lead to root rot.

Reduce watering frequency during winter months when the plant's growth slows down.

Prune in late spring or early summer after flowering to maintain shape and encourage bushier growth. Remove any dead or damaged stems at any time.

Light pruning helps to prevent the plant from becoming leggy and promotes better air circulation, which can reduce the risk of fungal diseases.

Propagate from semi-hardwood cuttings taken in late summer or early autumn. Root cuttings in a well-draining potting mix, keeping them lightly moist and in a bright, indirect light location.

Alternatively, propagate from seed sown in spring, though this is a slower method.

Repot every 2-3 years or when the plant becomes root-bound. Use a well-draining potting mix, such as a blend of potting soil and perlite. Choose a pot that is slightly larger than the current one.

Repot in early spring before new growth begins.