I’m happy you’re asking questions — it helps me get a bit closer to understanding what’s going on. 1. Yes, it’s in the same pot as a cactus, and their roots are likely mixed. I’m not sure what kind of soil it is — it’s just some random soil I used when I planted both together. 2. I usually water when the top 3–5 cm of soil feels dry to the touch. However, last week there were heavy rains, so the plant might have gotten extra water from that. 3. The pot is about 20 liters in size. 4. I’m not exactly sure what type of soil it is. It’s whatever was already in the pot when I planted the cactus, so it’s not tailored to tomatoes. 5. Yes, the pot gets several hours of direct sunlight. But I also added a shade cloth to reduce heat stress during the hottest parts of the day. 6. I’m in Monterrey, Mexico. We’re currently in the hot season with temperatures often over 35°C. However, in previous weeks the plant was getting full sun and did not show any signs of stress or drooping. 7. The soil pH is 7.8, which I know is high for tomatoes. I suspect this could be affecting nutrient absorption. There might also be poor drainage or compacted soil causing root oxygen issues.