Phalaenopsis Bottom Leaf Yellowing: Natural Aging or Problem?

Good News: It's Probably Normal

Lowest leaf yellowing = oldest leaf aging out. Phals grow new leaves from the crown; bottom leaf sacrifices itself. Leave it—it'll drop naturally. Watch for new leaf emerging at crown = healthy cycle.

Better Watering: Bottom Watering Method

1. Set pot in container.
2. Add lukewarm water to near rim.
3. Soak 20–30 minutes.
4. Remove; drain thoroughly.

Why? Prevents crown rot (water in leaf axils). Use lukewarm water—cold shocks roots.

Watering Frequency

Mix barely moist between waterings. Not a schedule—test by pot weight or skewer.

Fertilizer

Balanced orchid fertilizer at ¼ strength, every 2–3 weeks. Phals need little.

Verdict

Your plant sounds healthy: new spike, new buds opening. Bottom leaf yellowing is a non-issue. Keep up the good care!