Maximize Greenhouse Profits: Lighting, Propagation & Space Optimization

Profitable greenhouse growing demands precise environmental control. Master these technical fundamentals for consistent, high-quality production.

Optimal Growing Conditions

• Daytime: 70-75°F, nighttime drop of 10°F
• Increase humidity with pebble trays
• Sterilized soil, species-specific watering
• Biweekly preventive insecticide spraying
• Pot up as plants grow
• Light duration: 12-16 hours (flowering), 4-8 hours (foliage)

Light Distance Guidelines

• Light-lovers (gloxinias, cacti, coleus): 8 inches from fixture
• African violets, rex begonias: 11 inches
• Foliage plants (philodendron, ivy): 18-24 inches
• Adjustable pulley systems accommodate mixed crops

Propagation Under Lights

Gesneriads (African violet family) root quickly from leaf cuttings in vermiculite/peat/sphagnum under plastic tents at 6-8 inches from lights. Transplant in 3-4 weeks.

Tubers/rhizomes on moist peat at 4-6 inches from lights. Pot when sprouted.

Seeds on sterilized moss/sand/vermiculite under glass/plastic. Dark warmth (70-75°F) for germination, then 3 inches from lights for rapid growth. Flowering gloxinias in 3-5 months, African violets in 4-6.

Expand Growing Space

Convert basements, attics, closets with fluorescent setups. Check electrical capacity first. Commercial multi-shelf units hold hundreds of pots.

Mist Propagation Systems

Constant/intermittent mist prevents wilting and fungal issues on softwood cuttings. The Mistic Bubble (4-ft diameter, 12 sq ft) roots 1000 cuttings using electronic leaf controller. Portable, hardens plants for outdoor transition. Principles apply to DIY fog nozzles or commercial kits.

These systems enable year-round production and profitable nursery operations.