Guides

Each guide answers one question completely, using what you can see without a microscope or a lab.

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  Overwatering or Underwatering? The Leaves Won't Tell You

  Both make a plant droop and yellow, and the treatments are opposites. The soil, the leaf texture and the recovery time separate them in under a minute.

  3 min read

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  Which Tomato Leaf Spot Is It? Rings, Dots and Grease

  Four diseases spot tomato leaves and they need different responses. Concentric rings, tiny black dots and a greasy texture separate them — one of them needs acting on today.

  4 min read