Growing Rose 'Iceberg' in a pot

Rose 'Iceberg' has moderate water needs. Water deeply once or twice a week during dry spells in spring and summer, soaking the root zone rather than wetting the foliage, which encourages fungal problems. In autumn and winter, rainfall is usually sufficient unless conditions are exceptionally dry. Mulch in early spring with well-rotted manure or compost to conserve moisture, suppress weeds and feed the soil as it breaks down. Feed in March as growth begins, using a balanced rose fertiliser or general-purpose granular feed such as blood, fish and bone, scattering it around the base and watering in. Apply a second feed in June after the first flush of flowers to sustain the plant through its long flowering period. Avoid feeding after mid-summer, as soft late growth is vulnerable to frost damage. 'Iceberg' is fully hardy in zones 5–9 and requires no special winter protection in temperate Europe. In exposed gardens, a mulch layer helps insulate roots during hard frosts. Remove fallen leaves and debris from around the base in autumn to reduce overwintering of blackspot spores. Blackspot, powdery mildew and rust are the most common problems. 'Iceberg' has reasonable disease resistance but can still be affected in humid summers or crowded plantings. Remove and bin infected leaves promptly—never compost them. Aphids often cluster on soft new shoots in spring; squash by hand or spray with water. Encourage natural predators like ladybirds and hoverflies. This is a high-maintenance rose that rewards regular attention with months of prolific white blooms, but it does demand consistent feeding, deadheading and vigilance against pests and diseases.