The best beginner gardening flowers are:

Marigolds: These bright blossoms tolerate heat well and bloom throughout the season, right up until frost. Remove dead blossoms to keep new buds coming.

Zinnias will grow without any special treatment. Tall varieties may need to be tied to a stake to keep them from flopping over. Pinch off dead blooms.

Cosmos: These daisy-like flowers do well in a wide range of soils and can withstand drought once they’ve reached maturity. They love warm weather, so wait to plant until all chance of frost has passed. (Miraclegro.com)