Watermelon auto & northern light auto

Not sure this is still called veg because I'm getting white pistils but no buds yet and they are still growing. The plants are still bushing out, won't top them because I'm afraid that might trigger flowering. They look very healthy still, the NL is still very small compared to the watermelon. Still doing lst on a daily basis. I do not feed the plants at all besides watering them with water from fish thanks. Made some live soil and added horse manure, homemade bone meal from fish bones, compost from vegetable scraps and black soldier fly frass. I do not use chemicals on any of my grows.