Crimson Japanese maple foliage

905 guides · sourced to university research

Know every plant you grow.

Care, timing and troubleshooting for outdoor plants, lawns and vegetables, matched to your hardiness zone and frost dates.

Pl. I — Acer palmatum, the Japanese maple. Hardy in zones 5–8.

Tomato leaves with blight lesions

The plant doctor

Something is wrong.

Start with what you can see. Each guide shows how to confirm the cause before you spend money treating it.

In season

October

Checked againstCornell Cooperative Extension / NC State Extension / Penn State Extension / UC Statewide IPM / Missouri Botanical Garden