Are Four O'clock Flowers Poisonous?

You are right: Japanese beetles love to dine on four o'clocks, and according to several university sources these plants are poisonous to them. They are also toxic to people and pets. They can cause vomiting and diarrhea if eaten and the sap can cause dermatitis.

Are four o'clock flowers edible?

Edible Uses of four o'clocks (Mirabilis jalapa).

The crimson flowers are used to make an edible dye for coloring cakes, jellies and desserts.

Are 4 o'clock seeds poisonous to dogs?

Four o’clock is a garden flower that also grows wild in some parts of southwestern United States. Alkaloids in the roots and seeds can be moderately toxic for dogs. Most symptoms are limited to vomiting and diarrhea as well as topical skin irritation.