Your question doesnt provide necessary info to be answered properly. Most important info you didnt provide is the nature of your medium and growing style.
If your soil is amended. Dont feed till it finishes whats in there or at least whats in there is failing to provide for the rapid growth and the plant is starting to get deficiencies.
If you’re growing in an unfertilized mix, you can start with 1/4-1/8 dosage after true leaves appear. Adjust according to the response.
Thats just my 2 cents.