Overwintering and Propagating Sutera in an Unheated UK Greenhouse

Challenges of Bacopa Propagation Without Supplemental Heat

Standard cutting protocol applies: 6+ inch tender shoots, strip lower leaves, dip in rooting compound, insert 1 inch into moist potting mix, cover with plastic, provide indirect light or fluorescent lighting. Check for roots in 2 weeks.

Critical Limitation

An unheated greenhouse in Wales cannot provide the consistent warmth (75°F) and humidity bacopa needs for reliable rooting, especially outside of summer months. Cuttings taken in autumn/winter will likely fail without a heated propagator mat and enclosed humidity chamber.

Alternative Strategy

• Take cuttings in late spring when greenhouse warms naturally
• Use a heated propagator unit indoors
• Overwinter mother plants in a cool, bright indoor location
• Resume propagation in April-May

Bacopa is tender perennial; protect stock plants from frost to ensure cutting material for next season.