Repot only when roots and leaves have filled the existing container or are causing it to buckle. RHS says the plant is generally content in its original container for the first few years.
How to repot Sansevieria trifasciata
Repot when roots and leaves fill the container or make it buckle, not on an annual schedule. Choose a slightly larger pot with drainage holes.
Check the roots, mix and drainage
When to repot
Spring is the generally preferred time for repotting as growth resumes, but use the root-fill trigger and plant condition rather than making it an annual task.
Use the smallest practical size increase
Choosing the next pot
Choose a pot only slightly larger than the previous one and with plenty of drainage holes. A much larger pot keeps spare compost damp longer and raises root-rot risk.
Move the rootball without unnecessary damage
How to repot
Use free-draining peat-free cactus compost, or mix two parts peat-free loam-based compost with one part horticultural grit or fine gravel. Set the plant without burying the leaf base.
Keep light, water and support steady
After repotting
Water the fresh compost through the drainage holes and empty collected water, then return to the dry-compost check because excess moisture commonly causes poor health and root rot in Sansevieria.
Sources
- Royal Horticultural SocietyPlanting; Ongoing Care > Watering; Problems
- North Carolina Cooperative ExtensionName/Description; Whole Plant Traits; Cultural Conditions; Landscape
- Royal Horticultural SocietyWhen; Potting on; Root pruning; How to repot a plant; Aftercare