48x48x80 tent users plz help w size

What’s the tallest you’ll let ur plants grow before starting to flower right away in a 48x48x80” tent?

MY RUN INFO:

1. Indoor or outdoor? - size of grow? A: Indoor 48x48x80” tent 5 plants only.
2. Otigin of seeds? A: Gb
3. Regular, feminized, or autoflower? A: Fems. photoperiods 18/6.
4. Origin of water. PH, EC/TDS of source water? A: tap. Dechlorinated in 5 gal bucket w air stone 24/7. 8.4tap ph before gh ph down to 6.5
5. PH and TDS/EC of if mixed solution? 6.5 gh ph down used.
6. Grow method? Soil, Soil-less, Coco, Hydro, Aquaponics. Please explain. A: soil. FF oceanforest & happyfrog 50/50 mix w 5% coco added also a bit more of perlite and wormcastings
7. Nutrients or fertilizer system used. A: Gaia green 444&284 50/50mix only 1 tbsp each & bit of wormcastings.
8. What typr of lighting are you using? LED, HID (MH, CMH, HPS), or Fluorescents? Please elaborate. A: spiderfarmer sf4000 40% 24ish” 132watts above tops of plants.
9. What are the temps in your growspce? Day / Night? A: 68-70 night. 71-77 day drafts make this hard to control.
10. What is the RH = relative humidity in your growspace? Day / Night?26-32
11. AC, Humidifier, De-humidifier?
12. Do you have a Ventilation system? Size? 4", 6"?
13. Co2 Yes / No? A: no.
14. How long have you been growing? A: First timer. On week 4 veg.
15. What budget have you set in order to grow successfully? A: Cheap as possible for essentials only w longevity.

Research your strains stretch, and measure everything. Pots from the the top of soil, to the lights max hanging distance. Find out how much space you are working with in between the soil level & 20” from your light when it’s at max hanging height. This will help you figure out when to flip.

I'm not sure what strain gb is but it's really going to depend on the stretch of the plants genetics and what size pots you have them in to a lesser degree. I'd be working on a humidifier to get your humidity up soon. You need better (higher) humidity in veg than what you're running. Hydrokids advice is spot on as a good starting point and if you find yourself getting too close to the lights you can bend them by training.

Training/tying during the stretch is much easier than trying to control them when you get tight on space later in flower. I always just assume height is going to be an issue.
Sometimes im wrong, sometimes not, but id rather not have to resort to breaking stems to make it till harvest

Agree with the above sentiment. Assume that your plants will at least double in height in stretch.