Every leaf in your garden is a status report. Long before a plant stops producing, its leaves broadcast exactly which nutrient is running short — in a visual language of color, pattern, and position that any gardener can learn to read. Glance at a struggling plant and ask: is the trouble at the bottom or the top? You've already narrowed the diagnosis in half.

Trimming brown tips treats the symptom. The leaf has already told you something about water, salts, heat, or nutrition — the real work is answering it. Here's how to read what your plant is saying before the damage spreads.

A gardener in Grant Park sees a tomato plant fading to yellow and reaches for the watering can. A neighbor in Ormewood Park sees the same thing on her hydrangea and reaches for fertilizer. Half the time, both are treating the wrong problem — because not all yellowing is the same.