Can you plant flowers in the middle of summer?

Yes, but choose heat-tolerant flowers and give them extra care to establish. Warm-season annuals like zinnias, marigolds, celosia, vinca and portulaca actually thrive planted into warm summer soil. The challenge is not the plant type but the establishment period: new roots in hot, dry conditions need consistent moisture. Plant in the early morning or evening, water deeply and often for the first two to three weeks, and mulch to keep roots cool.

What flowers can survive extreme summer heat?

The toughest heat-and-drought performers are portulaca (moss rose), vinca (Madagascar periwinkle), lantana, celosia, zinnia, marigold, gomphrena, angelonia and sunflowers. These handle full sun and high temperatures with minimal fuss once established, and several are quite drought-tolerant. For hot shade, caladium, coleus and impatiens hold up well. Native wildflowers adapted to your region are also reliable choices in extreme heat.

Is it too late to plant annuals in July?

Not at all. In most of the country July planting of heat-loving annuals still gives you two to three months or more of bloom before frost, especially in zones 7 and warmer where the season runs into October or November. Buy healthy transplants for a faster display, or direct-sow fast growers like zinnias and cosmos, which can flower in six to eight weeks. Just water new plantings diligently through the summer heat.

What flowers bloom all summer long?

Reliable all-summer bloomers include zinnias, marigolds, petunias, lantana, vinca, cosmos, salvia, angelonia and coreopsis, most of which flower from planting until frost if deadheaded. Among perennials, coneflower, black-eyed Susan, daylily and coreopsis give long summer displays. Deadheading (removing spent flowers) is the key to continuous bloom in annuals, since it stops the plant from putting energy into seed.

Do summer flowers need more water than spring flowers?

Yes, considerably. Summer heat drives faster evaporation and transpiration, so both new and established flowers need more frequent watering, especially in containers, which can dry out daily in extreme heat. Water deeply at the base in the early morning so plants are hydrated before the heat peaks, and mulch beds 2 to 3 inches to slow evaporation. Newly planted summer flowers need the most attention until their roots establish.

What Flowers to Plant in Summer: Heat-Loving Picks

Written & researched by Elena Marsh Gardening & Landscaping Editor

Updated April 2026

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The flowers to plant in summer are heat-loving, sun-tolerant annuals that thrive when the weather turns hot: zinnias, marigolds, celosia, vinca (periwinkle), portulaca (moss rose), lantana, gomphrena, angelonia and sunflowers. For summer shade, plant caladium, coleus and impatiens. The trick to summer planting is not the plant choice but establishment: new roots in hot, dry soil need consistent moisture, morning or evening planting, and mulch. This guide covers the best heat performers for sun and shade, plus how to get them established when it is hot.

Our picks rest on university extension guidance and gardener consensus rather than first-hand trials, as explained in how we rank.

The best heat-loving flowers for full sun

These annuals do their best work in the heat, flowering nonstop from planting until frost. Several are genuinely drought-tolerant once established.

Flower	Heat / drought tolerance	Bloom window	Method
Zinnia	High heat, moderate drought	Summer to frost	Direct seed or transplant
Marigold	High heat	Summer to frost	Seed or transplant
Vinca (periwinkle)	Very high, drought-tolerant	Summer to frost	Transplant
Portulaca (moss rose)	Extreme, very drought-tolerant	Summer to frost	Seed or transplant
Lantana	Extreme, drought-tolerant	Summer to frost	Transplant
Celosia	High heat	Summer to frost	Seed or transplant
Gomphrena	High, drought-tolerant	Summer to frost	Seed or transplant
Angelonia	High heat and humidity	Summer to frost	Transplant

Sunflowers are the classic summer sowing, fast from seed and unbothered by heat; see how to grow sunflowers for spacing and support.

Flowers for hot shady spots

Not every summer garden is baking sun. For shaded and part-shaded beds that still get summer heat, these hold color where sun-lovers would struggle:

Caladium for bold foliage color in deep shade; loves heat and humidity.
Coleus for vivid leaf patterns in part shade to shade; pinch to keep bushy.
Impatiens for continuous flower color in shade; keep consistently moist.
Begonia (wax and tuberous) for part shade; tolerant of heat with moisture.
Torenia (wishbone flower) for a trailing shade bloomer that shrugs off humidity.

Perennials that bloom through summer

If you want returning color rather than annual replacement, several perennials peak in summer heat. Coneflower (Echinacea), black-eyed Susan (Rudbeckia), daylily, coreopsis, salvia and coneflower relatives all bloom for weeks in full sun and are extremely hardy. Plant container-grown perennials in summer only if you can water diligently while they establish; otherwise, fall is the easier season. See perennials to plant in fall for the alternative timing.

How to plant flowers in summer heat

Summer planting succeeds or fails on establishment. The plants can take the heat; their brand-new roots in dry soil cannot, at least not yet.

Plant in the cool of the day. Early morning or evening, never in midday sun, to reduce transplant shock.
Water the plant before and after. Soak transplants in their pots first, then water in thoroughly.
Mulch immediately. A 2 to 3 inch layer keeps roots cool and slows evaporation dramatically.
Water deeply and often for two to three weeks. New roots dry out fast; check daily in extreme heat, especially containers.
Provide temporary shade for the first few days if a heat wave hits right after planting.
Hold off on heavy feeding. A dilute balanced feed is fine once established; heavy nitrogen stresses new plants in heat.

Summer flowers for containers

Container plantings dry out fastest in summer, so lean on drought-tolerant heat lovers: portulaca, lantana, vinca, angelonia, gomphrena and trailing petunias. Use a quality potting mix, choose pots large enough to hold moisture (small pots cook), and be prepared to water daily, sometimes twice, in extreme heat. Self-watering containers or a drip line make summer container success far easier. A balanced slow-release fertilizer mixed into the mix at planting feeds them through the season.

Keeping summer flowers blooming

Deadhead regularly. Removing spent flowers keeps annuals producing instead of setting seed.
Water deeply in the morning so plants are hydrated before peak heat.
Mulch and maintain it to cool roots and conserve moisture.
Feed lightly and steadily, with a balanced fertilizer; see the best fertilizer for hibiscus for how a balanced feed supports heat-loving bloomers.
Shear leggy annuals midseason to force a fresh flush of growth and flowers.

Summer is prime planting season if you match the flowers to the heat and nurse them through establishment. For the seasons on either side, see spring flowers to plant and fall flowers to plant, or return to the Flowers & Ornamentals hub.

What Flowers to Plant in Summer