Need help fixing a nutrient deficient plant

Grow medium: fox farms happy frog soil
Veg day 63
Watering in 5gallon fabric pots: 1/2 gal every 5 days varying ph between 6-7

I have been giving grow big/big bloom/cal-mag minimally and not at all in the past 2 weeks because my other 2 plants aren't showing any signs of deficiencies and have been doing well. This is my only sativa plant and the largest maybe thats why. Should the plant be flushed? Or do I need to up the nutrients and start feeding again?

How can I fix my plant

If you’ve been vegging for 9 weeks there’s nothing left in your Happy Frog.
Start feeding. No need to leach your soil.

drsaltzman said:

If you’ve been vegging for 9 weeks there’s nothing left in your Happy Frog.
Start feeding. No need to leach your soil.

Click to expand...

Vegged in 1 gallon for 4 weeks and then transferred to 5 gallons with new soil. Maybe the replenish of nutrients from the added 4 gallons is up though. Thanks!