Planting out agapanthus

They thrive in sun or partial shade, but for maximum flowers, plant in full sun in cooler regions and in hot areas plant where they get at least 6 hours of sun/filtered light, preferably from early morning. Inadequate sunlight may result in thin stems, poor growth and no flowers. 

Agapanthus grow in all soil types, provided drainage is good, and require little water once established. It is best to plant in a raised garden bed. Do not use new mixes containing rich organic manures that have not been properly composted as these can cause the collapse and death of roots and eventual rotting of the plants. This burning of the roots is first noticed by dieback in the foliage from the tips or yellowing of lower leaves. If you notice dieback, check the roots. Agapanthus do best in free draining loam to sandy soils with a neutral to slightly acidic ph. Coir fines (de-salted) blended at about 20% will boost organic matter in garden soils and improve the air-filled porosity in the soil. 

The best time to plant agapanthus in the garden is from April to August. Outside of this time seek to plant out in the afternoon or on cool overcast days.

Limit the amount of water applied as it would take up to a month for the roots to establish. Overwatering during this time can cause rot and plant death. They are a drought tolerant plant and store water for later use in the roots. They will be at their happiest if the soil is allowed to dry out between drinks. Once established they may only need supplemented watering if rainfall is insufficient. At the time of planting, mix some slow release fertiliser into the surrounding soils. Avoid using a liquid fertiliser until established. 

For smaller cultivars like Bella™ , Lilibet™ and Maxsie™ , plant out 4 to 1 metre. For larger cultivars like Blitzza™ , Madison™  and Queen Mum, plant out 3 to 1 metre. If after a more instant impact plant a little closer.