This month...

Soil is still warm at this time of year, which helps new or transplanted shrubs and trees to establish strong root systems, so that by the time spring arrives they will produce strong new growth that will stand up well to wind and heat. • Divide large overcrowded agapanthus. If matted, use two forks, back-to-back, to separate the plants or cut through cleanly with a sharp knife. Replant in fresh soil in a sunny position, keeping clumps fairly large to ensure they bloom next summer. • Divide overgrown clumps of irises and replant young outer growths in well-drained, composted soil. Plant bearded iris with the tops of the rhizomes slightly exposed to the sun. • Cover Japanese iris rhizomes with soil. Plectranthus • March and April are the main planting months for sweet peas. They need a sunny aspect and soil dug over to at least a spade deep, then enriched with compost and an organic fertiliser. • Buy spring-flowering bulbs now to ensure that you get the best quality and variety, but wait until soil cools in April before planting. • Camellias need regular watering now to prevent flower buds from aborting. Spread a thick mulch of compost or pine needles around the root area to retain moisture, keeping away from the stem. The graceful, evergreen growth habit of autumn-flowering Camellia sasanquas makes them suitable for screening or as accent plants. • Lift summer-flowering bulbs such as gladiolus and dahlias that have completed their flowering cycle and store in a cool place. If left in the soil, mark their position to avoid damage when they are dormant. • Autumn-flowering white, pink, mauve and purple Plectranthus species suitable for semi-shade in mild frost areas are available now, as is the mauve ribbon bush (Hypoestes aristata) which can take more sun. • Mix Namaqualand daisies with blue flax (Heliophila coronopifolia) for an attractive indigenous early spring show. Sow seed thinly in full sun and in ordinary garden soil. >>