Starting Tuberous Begonias Indoors: A Complete Guide

Planting Tubers

• Use 3-inch deep sterilized pots with drainage.
• Fill with organic compost/potting mix.
• Place tubers hollow-side up, just below soil surface.
• Water deeply; keep at 65°F+.
• Cover with clear plastic until sprouts appear.
• Remove cover; water when top 1 inch is dry.

Growing On

• Bright light, no direct sun (SE window or fluorescents 3 inches above).
• Feed half-strength balanced fertilizer when stems are 3 inches tall.
• Feed every 10 days at full strength thereafter.
• Transplant outdoors after frost when shoots are 6 inches tall.