Grand naine (G9) Primary Hardening Plant

• Hardening Medium: The ideal growing medium for primary hardening is a mixture of soil, vermiculite, and vermicompost in a 2:1:1 ratio. This medium enhances water retention, aeration, and nutrient availability, promoting strong root and shoot growth.

• Duration: The plantlets are kept in greenhouse or polyhouse conditions for about 25-30 days during primary hardening.

• Conditions: Controlled environment with adequate humidity, temperature, and light shade is maintained to avoid shock or desiccation.

• Plantlet Care: Regular watering, monitoring for diseases, and gentle handling are crucial to maintain plant health.

• Outcomes: This process results in higher survival rates (~80%), increased root number, larger leaf area, and improved stomatal function, which are vital for healthy acclimatization to field conditions.

This hardening stage determines the field performance of Grand Naine banana plants, ensuring early establishment, uniform growth, and robust yields.