The growth time for hydroponic lettuce can vary depending on the specific lettuce variety, environmental conditions, and the desired size for harvest. However, lettuce is generally known for its relatively quick growth compared to many other crops. Here are some general guidelines for the growth time of hydroponic vertical lettuce tower:
- Leaf lettuce: Leaf lettuce varieties, such as green leaf, red leaf, and butterhead lettuce, are typically harvested at the baby leaf stage or as mature leaves. Baby leaf lettuce can be harvested as early as 3 to 4 weeks after planting, while mature leaf lettuce may take around 6 to 8 weeks to reach full size.
- Romaine lettuce: Romaine lettuce, also known as cos lettuce, takes slightly longer to grow compared to leaf lettuce. It usually takes around 8 to 10 weeks for romaine lettuce to reach maturity.
- Bibb and butterhead lettuce: Bibb and butterhead lettuce varieties, which have more compact heads, generally require 8 to 10 weeks to reach maturity. These lettuces are harvested when the heads are fully formed and compact.
It’s important to note that these timeframes are approximate and can vary depending on various factors, including temperature, light levels, nutrient availability,hydroponic nft channel and specific lettuce variety. Additionally, some growers may choose to harvest lettuce at different stages, such as baby leaf stage, for a continuous harvest rather than waiting for full maturity.
By monitoring the growth of the plants and observing the development of the lettuce leaves or heads, growers can determine the optimal time for harvest based on their preferences for size, taste, and texture.