Best Flowers for Pots in Full Sun: 10 Reliable Choices

A sunny patio, a flight of steps or a bright doorstep is a fine place for color, as long as you choose plants that enjoy the heat and light that come with it. The best flowers for pots in full sun stay fairly compact, keep making buds for months and cope with a root zone that warms up and dries out faster than a garden bed.

The ten plants below are widely sold in spring and are popular with beginners. None is difficult, but each has a habit and one quirk worth knowing before you buy. In cold-winter climates most of them are grown as annuals: planted once frost danger has passed, enjoyed through the warm months and replaced the following year.

First, confirm the spot is really full sun

On a plant tag, full sun usually means about six hours or more of direct sun a day. A spot that looks bright at noon may be shaded by a wall or a tree for much of the afternoon, so it is worth learning how to read the light where your pots will stand before you spend money on plants.

If the count comes out at only a few hours, these ten will grow leggy and flower thinly. In that case, pick from the container flowers that keep their color in shade instead.

Three habits: upright, mounding and trailing

Habit is the natural shape a plant grows into. Upright plants give height, mounding plants form a rounded dome that fills the middle of a pot, and trailing plants spill over the rim and soften the edge. Knowing the habit tells you where a plant belongs and how much room it will take.

A single habit in a pot looks tidy and simple. Combining all three in one large container is the idea behind the thriller, filler, spiller recipe for mixed pots, which is a good next step once you know your plants.

Upright flowers for height

• Geraniums (pelargoniums). Sturdy, upright plants with rounded flower clusters held above the leaves, often reaching about 12 to 18 in (30 to 45 cm) in a pot. They tolerate the mix drying a little between waterings better than most, and they dislike sitting wet.
• Salvia (annual bedding types). Upright spikes in red, purple, blue or white on bushy plants. The spikes add a vertical line among rounder flowers. Size varies a good deal by type, so check the plant tag.
• Zinnias (compact types). Daisy-like or pompom flowers in strong colors on stiff stems. Choose types described as compact or dwarf for pots. Crowded plants with damp leaves are prone to powdery mildew, so give them space and water the mix, not the foliage.

Mounding flowers that fill a pot

• Marigolds. Neat domes of yellow, orange and rust flowers. The smaller French types, commonly about 6 to 12 in (15 to 30 cm) tall, suit pots best; the tall African types need a large, heavy container to stay upright.
• Lantana. Clusters of tiny flowers that often shift color as they age. It thrives in heat. Some types mound and others spread wide, and in cool weather growth is slow.
• Petunias. Trumpet flowers in nearly every color. Depending on the type they mound or trail, so read the tag. Stems tend to grow long and bare by midsummer, and a trim brings them back.

Trailing flowers for the rim

• Calibrachoa. Looks like a miniature petunia and carries a great many small flowers on trailing stems. It needs a freely draining mix and does poorly in a pot that stays soggy.
• Verbena. Flat clusters of small flowers on spreading stems. Good air movement around the plant helps, since verbena can also get powdery mildew when crowded.
• Sweet alyssum. A low, fine-textured edging plant with tiny honey-scented flowers, usually white, pink or purple. It often slows down in the hottest weeks and picks up again when nights cool.
• Nasturtiums. Round leaves and bright orange, yellow or red flowers, easy to grow from large seeds pushed straight into the pot. They flower better in a lean mix; rich feeding tends to produce leaves at the expense of blooms.

Habit and deadheading at a glance

Deadheading means removing faded flowers so the plant keeps making new ones instead of seed. Some of these plants need it regularly and some tidy themselves.

For exactly where to cut, see the guide to deadheading and pinching container flowers.

How to buy good plants

The tallest plant in full bloom is rarely the best one on the bench. Look for these signs instead:

• A compact, bushy shape with several stems, not one long one.
• Plenty of buds still to open, with only a few flowers out.
• Leaves that are evenly green, with no spots, stickiness or insects underneath.
• Roots that hold the mix together without circling in a tight, matted mass.

Read the plant tag for mature height and spread. Named types of the same flower can differ widely, and the tag is the only reliable guide to the one in your hand.

What sun pots need from you

Full sun means faster drying. How quickly a pot dries depends on its size and material, the plants, the wind and the weather, so conditions vary from pot to pot. Feel the mix a couple of inches down and water thoroughly when it is dry at that depth.

Flowering plants in a limited volume of mix also use up nutrients. If you feed, follow the fertilizer label and do not exceed it.