Growing Banana Plants in a Greenhouse
A greenhouse solves most of the problems that cold-climate banana growers face. It extends the growing season, provides warmth and humidity, and protects against wind damage. With a heated greenhouse, even growers in zone 4 can produce tropical banana varieties.
Advantages
- Controlled temperature and humidity
- Year-round growing season
- Protection from wind damage
- Ability to grow any variety regardless of outdoor climate
- Reduced pest and disease pressure (though not eliminated)
Temperature Management
Bananas grow actively when temperatures are between 75°F and 95°F. Growth slows below 60°F and stops below 50°F. An unheated greenhouse extends the season by months in cool climates but may not be warm enough for year-round growth. Supplemental heating allows continuous growing.
Variety Selection
In a heated greenhouse, you can grow any variety. Dwarf Cavendish, Blue Java, and Red Dacca are popular choices. Even Ae Ae and Gros Michel are feasible in a well-managed greenhouse.
Planting
You can plant directly in the greenhouse ground (best for full-size varieties) or use large containers. In-ground planting provides more root space and more stable moisture, which usually produces bigger, healthier plants. See Soil and pH for preparation.
Pollination
Bananas are parthenocarpic — they produce fruit without pollination. You do not need bees or hand-pollination in a greenhouse.