Troubleshooting
Lobelia erinus 'Techno Heat Blue' problems — and how to fix them
Lobelia erinus 'Techno Heat Blue' (Lobelia erinus 'Techno Heat Blue') 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.
Drying out in baskets
Despite better heat tolerance it is not drought-proof; vigorous trailing growth drinks heavily, so keep compost reliably moist.
Reduced bloom in deep shade
Bred for sun and heat, it flowers poorly in low light; give it a bright, sunny position for the fullest blue display.
Mid-season scruffiness
Long trailing stems can thin and go leggy; shear back by a third mid-season and feed to refresh the plant.
Aphids and slugs
Aphids cluster on soft tips and slugs nibble young plants; rinse or treat aphids and protect transplants early in the season.
Prevent lobelia erinus 'techno heat blue' problems before they start
Most lobelia erinus 'techno heat blue' issues are care-mismatch, not bad luck. Dial in the basics:
- Common edging lobelia problems — the species this cultivar belongs to
- What's wrong with my plant? — the diagnosis apps compared
- Lobelia erinus 'Techno Heat Blue' watering schedule
- Lobelia erinus 'Techno Heat Blue' light requirements
- Best soil mix for lobelia erinus 'techno heat blue'
- Lobelia erinus 'Techno Heat Blue' temperature & humidity
- Full lobelia erinus 'techno heat blue' care guide
Looking for lobelia erinus 'techno heat blue' in general rather than its problems? Read the full lobelia erinus 'techno heat blue' care guide — light, water, soil and feeding.
Lobelia erinus 'Techno Heat Blue' problems — FAQ
Why is my lobelia erinus 'techno heat blue' drying out in baskets?
Despite better heat tolerance it is not drought-proof; vigorous trailing growth drinks heavily, so keep compost reliably moist.
Why is my lobelia erinus 'techno heat blue' reduced bloom in deep shade?
Bred for sun and heat, it flowers poorly in low light; give it a bright, sunny position for the fullest blue display.
Why is my lobelia erinus 'techno heat blue' mid-season scruffiness?
Long trailing stems can thin and go leggy; shear back by a third mid-season and feed to refresh the plant.
Why is my lobelia erinus 'techno heat blue' aphids and slugs?
Aphids cluster on soft tips and slugs nibble young plants; rinse or treat aphids and protect transplants early in the season.