Troubleshooting
Rudbeckia 'Becky Mixed' problems — and how to fix them
Rudbeckia 'Becky Mixed' (Rudbeckia hirta 'Becky Mixed') 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.
Powdery mildew
White, dusty coating develops on lower leaves in warm, dry conditions. Remove affected leaves and improve air circulation; apply a potassium bicarbonate spray if persistent.
Slug and snail damage
Seedlings are most vulnerable. Protect with copper tape around container rims and organic slug pellets in borders.
Short-lived nature
As a biennial or short-lived perennial, plants may not persist beyond the second year. Allow self-seeding or raise fresh plants annually from seed.
Leggy growth in shade
Plants stretched towards light become weak and floriferous only at the tip. Always site in full sun for the compact habit the variety is bred for.
Aphids
Occasionally infest soft new growth. Control with a strong water jet or dilute insecticidal soap spray.
Prevent rudbeckia 'becky mixed' problems before they start
Most rudbeckia 'becky mixed' issues are care-mismatch, not bad luck. Dial in the basics:
Rudbeckia 'Becky Mixed' problems — FAQ
Why is my rudbeckia 'becky mixed' powdery mildew?
White, dusty coating develops on lower leaves in warm, dry conditions. Remove affected leaves and improve air circulation; apply a potassium bicarbonate spray if persistent.
Why is my rudbeckia 'becky mixed' slug and snail damage?
Seedlings are most vulnerable. Protect with copper tape around container rims and organic slug pellets in borders.
Why is my rudbeckia 'becky mixed' short-lived nature?
As a biennial or short-lived perennial, plants may not persist beyond the second year. Allow self-seeding or raise fresh plants annually from seed.
Why is my rudbeckia 'becky mixed' leggy growth in shade?
Plants stretched towards light become weak and floriferous only at the tip. Always site in full sun for the compact habit the variety is bred for.
Why is my rudbeckia 'becky mixed' aphids?
Occasionally infest soft new growth. Control with a strong water jet or dilute insecticidal soap spray.