Ok I water I use two pitchers of water (which I believe are 1 liter pitchers) in the morning I fertilized 3 months ago then refertilized this week. Last year they were at least 7ft by now
Try backing off on the watering. Daily seems excessive to me.
Check the soil down deep after a day to see how much moisture remains.
These plants don't want "wet" soil for extended periods...
The temperature seems to have a noticeable impact rocks even if placed in a outdoor pot on top 1/2 buried for the season - the rocks retained the daytime temp through the evening.
There are some recommendations of premixing hydrogen peroxide in your watering can a day before watering for boosting oxygen
I add molasses to my watering mixture as well to help nutrients not to leach or wash away immediately as well
Well I just looked at them I think it might of been all the rain and lack of son cause we have been having a lot of rain lately and pretty much no sun. Cause today they have sprouted all over the place new ones and off the vine them selves also.