What fertilizer makes Clivia leaves hard and thick with deep veins?

When caring for Clivia on a balcony, place the leaves sideways, and rotate the direction every 10 days. A few days ago, an elderly person came to my flower shop to ask me about his Clivia, whose leaves were asymmetrical, one side wide and the other narrow. This is caused by the placement.
Environmental issues:
For Clivia leaves to be hard and thick with deep veins, you need to use water control. And the timing of water control must be precise. Water replenishment must be balanced. You need to grasp a proper degree. Why are tree growth rings never a perfect circle? It is caused by imbalanced water and nutrients. So when Clivia leaves are growing, keep the potting soil on the dry side and replenish water evenly. Only then can the leaves be hard and thick with deep veins.
The issue of light is also a main reason affecting whether Clivia is hard and thick with deep veins. The position where Clivia is cared for will, because of the different sunlight in the four seasons, affect the leaves' photosynthesis. The care position should be changed according to the different seasons. In every season there needs to be 3 to 5 hours of light. With an appropriate amount of light time, Clivia leaves will be healthier.
Fertilizer use:
When caring for Clivia, I suggest directly buying nutrient solution. Now larger fertilizer companies all have nutrient solutions specifically for Clivia. Moreover, the dosage used, as well as the different seasons and different growth stages, all have strict usage dosages in the instructions. Clivia fertilizer nutrient solution, besides ensuring the normal supply of the three elements nitrogen, phosphorus and potassium, also provides targeted trace elements and mineral supplementation.