Is she hungry for nutes or is this a deficiency (new grower)

Nutrients are classified as either immobile or mobile depending on if it can be moved around the plant once it’s been fully absorbed. Mobile nutrients are stored in older leaves and can be moved around the plant wherever it’s needed. Immobile nutrients stay close to where they were originally deposited. Deficiencies & excess of mobile nutrients will appear in older growth and leaves first. Where as, deficiencies & excess of immobile nutrients will appear in new growth first usually at the top of the plant. Once you understand the difference and which nutrients are mobile and immobile, it makes it easier to diagnose & fix deficiencies. Whenever you suspect a deficiency, always check your pH first and ensure that it is in the correct range. If it isn’t within the correct range, it won’t be able to absorb some nutrients. So, you could be treating a deficiency, but if the pH is off, it won’t be able to absorb the nutrient still. If your pH is in the correct range, you can now try to figure out what’s going on. NPK the big 3 (& magnesium) are all mobile nutrients so the plant can take nutrients from old growth and use it for new growth if there is a deficiency. Since growth is only affected at bottom tells us it's a mobile nutrient. As the plant is taking from old growth to provide for new. Nitrogen deficient. Make sure you are de chlorinating your water for 24 hours prior to watering. Also. Top dressings can take time to breakdown, make foliar spray with warm water a sprinkle of hydrogen peroxide and some water soluble nitrogen fertilizer of choice. Spray and apply as needed for quick temporary remedy until things can balance back out. Curiously how did you deal with the toxicity earlier in its life?