Meyer Lemon Yellow Leaves After Summer Outdoors: Normal or Pot-Bound?

Vancouver, BC: Meyer lemon summered outdoors, doubled leaves. Brought in for fall; many leaves yellow with yellow spots. Fed Miracid weeks ago.

Possibilities

Natural thinning: Citrus shed interior leaves before bloom/fruit (tips stay green).
Pot-bound: Roots fill pot → can't uptake water → move to larger pot.
Nutrient adjustment: Miracid is acidic; citrus prefers slightly acidic but balanced feed.

If yellowing is interior with green tips → normal cycle. If overall pale → pot size or fertilizer.

Plant Diseases: Lemon Tree Leaf Curl and Yellowing in Madrid: Environmental Stress; Meyer Lemon Pest Management: Slugs, Aphids, Leaf Curl, and Organic Fruit Safety; Diagnosing Yellowing Leaves on Citrus Cocktail Tree; Aphids on Indoor Meyer Lemon: Organic and Chemical Options; Meyer Lemon Stripped of Leaves and Fruit: Need More Info; Lemon Tree Mysterious Decline: No Clear Pathogen, Focus on Cultural Care; Meyer Lemon Leaf Curl: Virus Unlikely, Insect/Chemical Investigation Needed; Meyer Lemon Leaves Flipping Upside Down? Check Your Drainage After Rain; Citrus (Clementine Orange) Leaf Drop After Moving Indoors: Acclimation Strategy; Meyer Lemon Leaf Drop: Watering Issues in Container Culture

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