Winter Lettuce - Day 17

WOW masses of growth overnight. It’s really starting to fill out the pot. we can’t believe how vigorous this winter lettuce is.

You may have noticed yesterday that the nutrient batch was starting to show it’s age and could do with refreshing with a new batch. We were seeing some green algae growth because the light is reaching the nutrient. Ideally you would use a grow system which excludes all light from the water which solves this issue. A quick check with a pH meter confirms that the pH has risen. We can either add some pH- (we use citric acid here at Home of Hydroponics as it’s safe to use and gentle on the plants). Alternatively we can refresh the nutrient with a new batch (which is what we did this time). Nice clear water at the right EC and PH = happy plants.