10 summer flowers for your pots and planters


We cannot do without summer flowering plants that we can install in pot, planter and suspension for greening the terrace, balcony and window sill. Their multiple colors brighten up our living spaces and, in this category, many plants are exuberant until the first frosts. Here is a selection of 10 summer flowers to treat yourself to generous stews even if you are a novice gardener.

1 – La Marguerite du Cap (Osteospermum)

This non-hardy perennial is grown as an annual in areas with a cold climate. Its flowers of different colors evoke those of the Marguerite, and some hybrids even cover themselves with flowers with very original spatulate petals. Osteospermum likes sunny and warm situations as well as moderately fertile, cool, even ordinary soils.

Easy to grow in a planter, Cape Marguerite simply needs moderate watering during periods of drought. It blooms for a long time, from May to October. To stimulate flowering, simply remove faded flowers as you go.

2 – Pelargonium (Geranium)

It is a must-have for balconies, well appreciated for its very abundant flowering. from June until frost. There are many species and varieties that are classified into three large groups: Large-flowered pelargonium or Florists’ Geranium with downy leaves and large flowers, Zonal pelargonium (Zonal Geranium or Straight Geranium) with rounded leaves and semi-double, double or single flowers, and Pelargonium peltatum or Geranium ivy with small shiny leaves, spectacular flowering and drooping habit. We can guide the branches of Geranium ivy using different trellises to obtain very original shapes.

Pelargonium is a plant with long-lasting flowering in various colors, perfect for pots, planters and pots. It thrives in sunny and warm conditions and in any type of soil as long as it is well drained. It turns out to be particularly floriferous if it benefits from frequent watering and receives a fertilizer for geraniums once a week throughout the flowering period.

3 – Perennial Geranium (Geranium)

It is often confused with Pelargonium also called geraniums. Perennial Geranium is easy to grow and blooms profusely from May until the end of summer, in various colors. He likes bright, sunny to half-shaded situations depending on the variety chosen and thrives in cool, well-drained and humus-rich soil. However, to grow it in a pot, it is better to prepare a suitable substrate composed of 70% siliceous loam and 30% well-decomposed soil.

To enjoy a multitude of flowers throughout the beautiful season, it is necessary to remove the deflowered stems as and when. It needs regular watering because its substrate must always stay cool.

4 – The Dipladénia (Mandevilla sanderi)

It is also called Mandevilla. This non-hardy perennial native to South America that flowers from June to September can be grown indoors but is happy to spend the whole beautiful season outdoors as long as it can benefit from a warm and sunny situation. Be careful, however, of the direct afternoon sun in the hottest regions. Dipladénia is a twining climbing plant that likes cool, well-drained and rich soils. It is able to reach 180 to 200 cm in height.

You can install stakes in the tank to allow its stems to wind up or let it climb along the railing. But it is also quite possible to leave it free of any support if you want its stems to fall back to form a breathtaking cascade of flowers.

In pots, Dipladénia needs watering per week, or even a little more frequently in times of drought and / or high heat. A fortnightly addition of liquid flower plant fertilizer stimulates flowering. Not hardy, it must be placed in a cold greenhouse before the first frosts until the following spring.

5 – Rooster Crest Amaranth (Celosia argentea var. cristata)

This annual plant is adorned with splendid wavy inflorescences, in the form of a crest (hence its name), with a velvet appearance, and which are available in different colors, from deep purple to yellow, via violet or even pink… She likes hot and sunny situations as well as soils rich in organic matter and well drained. It blooms profusely from June to October.

A copious watering is essential in midsummer when it is hot. Cultivated in a pot, the Amaranth Crête de Coq needs, about every three weeks, a supply of liquid fertilizer for flowering plants to be diluted in the irrigation water.

6 – The California Poppy (Eschscholzia californica)

We do not always think of cultivating the California Poppy in a pot when this method of cultivation suits it just as well as the open ground. This annual plant, about forty centimeters high, forms a large tuft of very indented leaves from which emerge from June to September a multitude of pleated flowers, single or double, pinkish white, yellow, fiery red, a pretty pastel mauve or even orange yellow and purple lilac with a white heart.

The Eschscholzia supports the maritime climate without flinching. This poppy likes to be installed in any exhibition and appreciates sandy soils because it is light. However, it tolerates poor soils, even limestone. Easy to grow, it does not need great care and can even be sown spontaneously in a stony path. After flowering, do not hesitate to use it as a green manure.

7 – The Lobelia (Lobelia)

Depending on the species, Lobelia can be grown as a perennial or an annual and, as is the case with the Lobelia erinus, offer a long-lasting flowering, namely from June until the end of October provided that it is avoided to expose it to the scorching sun. The Lobelia likes any type of exposure except full sun. It thrives in fairly cool, well-drained soil and is satisfied with ordinary soil.

It has few requirements other than moderate watering to keep the soil cool. More or less hardy, it needs its stump to be protected in winter with mulch. It is also possible to winter the Lobelia in a pot in a bright and frost-free room until April.

8 – The Petunia (Petunia x hybrida)

This perennial grown as an annual is one of the queens of planter cultivation as it blooms dramatically of the month from May until the end of October. The Petunia is covered with flowers declined in an amazing palette of colors, single-colored or variegated with the most beautiful effect, and in the shape of a funnel. The hanging varieties are the stars of the suspensions.

Petunias like situations protected from the wind, sunny to lightly shaded. They should be installed in a cool to moderately dry, well-drained and rich substrate. These summer flowering plants need regular watering during the flowering period and weekly fertilization with liquid fertilizer.

9 – Impatience (Impatient)

Another must-have for balconies, Impatience is a non-hardy perennial cultivated as an annual that is covered with flowers. July until frost. She likes semi-shaded to shaded situations only because she cannot stand direct sun, with the exception of some fairly new varieties on the market. Its soil should be rich, well drained, moderately moist (therefore cool).

We do not abuse the application of fertilizers which only develop the foliage to the detriment of flowering.

10 – The marigold

Perfect for warding off pests, the marigold is to be installed on window sills or can also be placed in balconies all along the railing of a terrace or balcony. From July to October, this rustic plant is adorned with multiple flowers, declining in a rich palette of mahogany, brown, orange red. He likes to be installed in a hot and sunny situation, but not very demanding, he tolerates the partial shade perfectly. The marigold appreciates any soil provided that the soil is well drained.

We enjoy continuous flowering throughout the summer and even more so when we take care to remove the faded flowers as we go. As for watering, they should keep the substrate fresh, nothing more.

Flowers in pots and planters: do not plant too early

This is THE advice to follow for success in growing summer flowers in pots. Better that they do not have to undergo the spring frosts, sometimes severe. Every gardener must therefore plan your plantations according to the local climate. In the softer regions you can start planting in a planter from April 15, while in the North of the Loire or in mountainous areas, it is wiser to wait until May 15. Urban gardens, since they are very sheltered, are a little less exposed to late frosts than those located in the countryside. It must also be taken into account …

All the summer flowers presented above form between them beautiful compositions and combine nicely with manyother summer flowering species like for example the Heliotrope, the Sage, the Marigold or the Agératum of Mexico and the Gaura… The gardener thus has no limit for greening the balcony and terrace throughout the beautiful season.