Growing in Plastic Tubs in Greenhouse

Question

We bought a small greenhouse last year and one of the uses for it was to be able to grow a few vegetables while is was too cool for them to be outside. We planted in plastic tubs that had drainage with at least 18 inches of potting soil in each tub. Fertilized the plants with fish emulsion and kept a small heater going along with a fan. We got lots of green tops but no vegetables (radishes, carrots, beets). Any ideas what we’re doing wrong?

Answer 1

Too much nitrogen is what happened. When plants have too much nitrogen, they get very leafy but have little fruit and roots. Give the plant some bone meal or something else containing phosphorous to rebalance the phosphorous and nitrogen in the soil. Here is more information: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/understanding-nitrogen-requirements-for-plants.htm, https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm