Methods and devices for stimulating growth of grape vines, grape vine replants or agricultural crops

A method of collecting and concentrating solar energy to a growing grape vine or grape vine replant, comprising:

• collecting and concentrating solar energy with a solar concentrator comprising a solar-facing surface positioned above the agricultural crop plant, the solar-facing surface comprising a reflective material;
• directing the collected solar energy toward the growing grape vine or grape vine replant through a light transmitter in optical communication with the solar concentrator, the light transmitter comprising:
• an inner wall comprising a perimeter positioned between the solar concentrator and the growing grape vine or grape vine replant, the inner wall further comprising a reflective inner surface for directing collected solar energy toward the growing grape vine or grape vine replant;
• positioning a protective inner surface defining a protected zone surrounding the agricultural crop plant, the protective inner surface extending downward from the light transmitter and comprising a rigid outer wall for protecting the protected zone from one or more growth limiting factors selected from the group consisting of:
• wind damage;
• heat damage;
• cold damage;
• frost damage;
• herbicide damage;
• and animal damage;
• and/or for reducing evapo-transpiration by the agricultural crop plant positioned in the protected zone,
• wherein one or both of the light transmitter and the protective inner surface comprise one or more openings for allowing one or both of a) operator access to the growing grape vine or grape vine replant therethrough and b) airflow between an outside environment and the protected zone.