Had mine under lights all winter, moved everything outside and everything got twice as phat and tall
W1mp-Lo
What does your lighting look like? Watts/sqft? What is your target ppfd? LEDs or HPS?
What do temps and humidity look like when lights are on and off?
What is your vpd?
What is your light schedule?
What kind of soil mix are you using?
What is your runoff PH?
What does your feed and water schedule look like?
What does the NPK and micro nutrient ratios on your feed look like?
All of those questions will help give anybody who wants to help a better understanding of your setup so they can pinpoint any problematic growth parameters and help you get better results.
EmergencyCress1864
Ive noticed recently that when i focus on growing strong roots girth follows
HomegrownTexas
Maxigro, better lighting and stay away from most bridgesii since many just grow skinny
Human-Cook
You have to form an “o” with your four fingers and thumb at which point your gonna wanna squeeze it gently right at the base.
From this point onward its pretty much cacti-dependent, but it usually will begin to get thicker if you’re doing it right.
Julian__4tw
Individual pots for each cacti. Larger the pot bigger the width. Stable temps preferably pretty cool in the low 70’s. Plenty of fresh air and quality feed schedule making sure to push certain types of nitrogen at the correct time. Plenty of quality light.
LojaRich

APaleontologist
My fattest cactus is in my biggest pot, so I think plenty of root space is a factor. (Other people have way fatter than I do though, I think with aggressive nutrient plans)
11 Comments
Had mine under lights all winter, moved everything outside and everything got twice as phat and tall
What does your lighting look like? Watts/sqft? What is your target ppfd? LEDs or HPS?
What do temps and humidity look like when lights are on and off?
What is your vpd?
What is your light schedule?
What kind of soil mix are you using?
What is your runoff PH?
What does your feed and water schedule look like?
What does the NPK and micro nutrient ratios on your feed look like?
All of those questions will help give anybody who wants to help a better understanding of your setup so they can pinpoint any problematic growth parameters and help you get better results.
Ive noticed recently that when i focus on growing strong roots girth follows
Maxigro, better lighting and stay away from most bridgesii since many just grow skinny
You have to form an “o” with your four fingers and thumb at which point your gonna wanna squeeze it gently right at the base.
From this point onward its pretty much cacti-dependent, but it usually will begin to get thicker if you’re doing it right.
Individual pots for each cacti. Larger the pot bigger the width. Stable temps preferably pretty cool in the low 70’s. Plenty of fresh air and quality feed schedule making sure to push certain types of nitrogen at the correct time. Plenty of quality light.

My fattest cactus is in my biggest pot, so I think plenty of root space is a factor. (Other people have way fatter than I do though, I think with aggressive nutrient plans)
https://preview.redd.it/jvmgxyto22of1.jpeg?width=1125&format=pjpg&auto=webp&s=6a8d31abaf681e1a0851b1c50e0a22ffa41f4f0e
Nutrients and full outdoor sun
Moar sun
A lot of those look like Bridgesii which grow skinnier than Scopulicola, Pachanoi, and Peruvians. Try feeding with nutrients.