Greenhouse Gardening Montana Style: Year-Round Growing Success

Owning a greenhouse enables year-round fresh, organic produce—but it's more than erecting a structure and adding plants. Success requires a comprehensive plan addressing:

• Greenhouse type: cold house, portable, hobby, kit, mini, or large
• Construction and foundation
• Equipment needs
• Covering/glazing selection
• Watering, humidity, heating, and air circulation systems

Cold House vs. Heated Greenhouse

A cold house (no artificial heat) extends the season by trapping daytime solar heat and sheltering from wind/rain—but can't grow frost-sensitive plants from late fall to mid-spring. Adding a heater (maintaining minimum 45°F/7.2°C) creates a true year-round greenhouse. Budget for heating costs. Build near your house to reduce utility installation expenses and improve winter access.

Watering Wisdom

Greenhouse watering differs from outdoor gardening. Enclosed environments trap moisture—less watering is typically needed. Overwatering fills soil air pores, suffocating roots and causing wilting—which prompts more watering, worsening the problem.

Golden Rule: Check soil before watering. Water only when dry. Use 65-80°F (18-27°C) water—never cold or above 80°F.

Options include irrigation systems, drip systems, misters, moisture sensors, and watering cans. Automated systems are invaluable during absences.

Plant Selection & Layout

Choose plants matching your preferences, then configure the interior accordingly. Trellis-needing plants (peas, tomatoes, cucumbers, roses, passionflower) require support installation. Place frequently harvested crops (lettuce, strawberries, broccoli) in accessible locations. Single-harvest crops (onions, carrots) can be less accessible.

Invest in a quality greenhouse gardening book for temperature, humidity, pH, and layout guidance tailored to your selections.