Summer savory is an annual culinary herb in the mint family, grown for its peppery, thyme-like leaves. It pairs with beans, lentils, and grilled meats, and is a core ingredient in herbes de Provence. Gardeners value it as a fast, low-maintenance herb that produces usable leaves within two months of sowing.
It is frost-sensitive, so sow after the last frost once soil has warmed. Plants are upright and somewhat sprawling; pinching the growing tips early encourages branching and delays flowering. Harvest leaves before and during bloom for the strongest flavor. It self-seeds readily if flowers are left to mature.
Powdery mildew
White or grey powdery coating on leaves — usually starting on older growth in humid conditions or when nights cool.
Improve air circulation by thinning plants. Apply neem oil or potassium bicarbonate spray at first sign. Avoid overhead watering.
Aphids
Clusters of small soft insects on new growth and flower buds.
Knock off with a strong jet of water. Ladybirds and lacewings are natural predators. Insecticidal soap as last resort.
Damping Off
Seedlings collapse at the soil line with thin, water-soaked stems; seeds may fail to emerge or rot before sprouting.
Sow in well-draining mix, avoid overwatering, and ensure good airflow. Remove affected seedlings and let the surface dry between waterings.
Thyme Root Rot
Stems blacken at the base, foliage yellows and wilts, and roots turn brown and mushy. Common in heavy or poorly drained soil.
Remove affected plants and avoid replanting thyme in the same spot. Improve drainage with grit or raised beds, and water only when soil is dry.