Lift the Norfolk Island pine when roots are congested, circle the container, emerge through holes, or the crowded root ball affects drainage. Do not repot solely because the tree has grown taller.
Norfolk Island pine repotting
Check roots and drainage before repotting Araucaria heterophylla. Move it in spring when roots crowd the container, using a well-drained mix and a container no more than one third larger.
Check the roots, mix and drainage
When to repot
Repot in spring as growth begins. Avoid fresh wet potting mix around the plant during slow winter growth. This is general container timing, not a fixed Norfolk Island calendar.
Use the smallest practical size increase
Choosing the next pot
If more room is needed, use a container no more than one third larger than the current one. For a smaller pot, use only a modest increase in width and depth.
Move the rootball without unnecessary damage
How to repot
Use a well-drained peat-free loam-based mix with extra grit, preserve the root ball and upright leader, and remove only soft or rotted roots found during inspection.
Keep light, water and support steady
After repotting
Water the refreshed container through and let excess drain, then keep the plant in its stable bright, sheltered position. If it moves outdoors in summer, return it under glass before cold weather.
Sources
- Royal Horticultural SocietyHow to Grow > Cultivation; container; soil; moisture; pruning
- North Carolina State University Extension Gardener Plant ToolboxDescription; Cultural Conditions; Uses; Problems
- Royal Horticultural SocietyWhy; When; Potting on; Aftercare