Really dark green tomato leaves that feel like rough paper

[Francis Barnswallow]

These tomato plants are also not producing. As the topic states, the leaves are a real dark green, are curled inward, and have a texture of rough paper (construction paper I.e.). The plants themselves are around 5 feet tall and don't have many branches. This isn't normal b/c I know what a healthy tomato leaf looks like.

I'm guessing I'm lacking a mineral in the soil. Any suggestions?

[johnny123]

Phosphorus deficiency will cause dark leaves and poor fruit setting.
Look on the bottom side of the leafs and see if you see any purple color in the veins.

[Francis Barnswallow]

The stalks have a little purple to them as well. Where can I get phosphorus?

[BP]

If you want to go organic, buy fossilized sea bird guano or High phosphorus bat guano.

[rainbowgardener]

bone meal and rock phosphate