Troubleshooting
Magnolia grandiflora 'Gallissonnière' problems — and how to fix them
Magnolia grandiflora 'Gallissonnière' (Magnolia grandiflora 'Gallissonnière') is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Leaf chlorosis
Yellowing between veins on alkaline or chalky soil signals iron/manganese lock-out; correct with ericaceous feed, sulphur or chelated iron and acid mulch.
Frost-damaged buds
Late frosts and cold winds can brown unopened buds and young foliage; a sheltered wall site and avoiding frost pockets reduces losses in cold UK areas.
Slow establishment
Resents root disturbance and may sulk for a year or two after planting; plant in late spring, water consistently and avoid moving once sited.
Leaf scorch
Hot afternoon sun or drying winds scorch the glossy leaves brown at the margins; consistent moisture and shelter from desiccating wind prevent it.
Prevent magnolia grandiflora 'gallissonnière' problems before they start
Most magnolia grandiflora 'gallissonnière' issues are care-mismatch, not bad luck. Dial in the basics:
- Common southern magnolia problems — the species this cultivar belongs to
- What's wrong with my plant? — the diagnosis apps compared
- Magnolia grandiflora 'Gallissonnière' watering schedule
- Magnolia grandiflora 'Gallissonnière' light requirements
- Best soil mix for magnolia grandiflora 'gallissonnière'
- Magnolia grandiflora 'Gallissonnière' temperature & humidity
- Full magnolia grandiflora 'gallissonnière' care guide
Looking for magnolia grandiflora 'gallissonnière' in general rather than its problems? Read the full magnolia grandiflora 'gallissonnière' care guide — light, water, soil and feeding.
Magnolia grandiflora 'Gallissonnière' problems — FAQ
Why is my magnolia grandiflora 'gallissonnière' leaf chlorosis?
Yellowing between veins on alkaline or chalky soil signals iron/manganese lock-out; correct with ericaceous feed, sulphur or chelated iron and acid mulch.
Why is my magnolia grandiflora 'gallissonnière' frost-damaged buds?
Late frosts and cold winds can brown unopened buds and young foliage; a sheltered wall site and avoiding frost pockets reduces losses in cold UK areas.
Why is my magnolia grandiflora 'gallissonnière' slow establishment?
Resents root disturbance and may sulk for a year or two after planting; plant in late spring, water consistently and avoid moving once sited.
Why is my magnolia grandiflora 'gallissonnière' leaf scorch?
Hot afternoon sun or drying winds scorch the glossy leaves brown at the margins; consistent moisture and shelter from desiccating wind prevent it.