labifleanswered grow question 6y ago Hey gardener! It's not the plants that grow too slowly, it's the gardeners who are too eager to see them grow lol. They are slow at first, but when growing on the balcony, it's better to use an eco lamp or LED bulbs to help with growth. I've seen guys grow just with regular LED bulbs, so you should be able to do something with that. Good luck, bella ciao!