Complete guide to plants for subtropical climates: species, tips, and design

El subtropical climate It is one of the most appreciated and challenging climates for those who want to grow gardens with exotic and colorful species. Thanks to its intermediate conditions between tropical and temperate climates, it allows for the development of a significant variety of plants, as long as their climatic characteristics are respected and the adaptation of each species is taken into account. However, the main challenge lies in dealing with factors such as Low temperature ranges in autumn and winter, occasional frosts and variations in ambient humidity.

Understand the fundamental characteristics of the subtropical climate, predominant types, their geographical distribution and which are the most emblematic plants For these environments, it's key to achieving a healthy, resilient, and attractive garden. Below, we explore in detail everything you need to know to select and care for your plants in this type of climate.

What characteristics does the subtropical climate present?

The regions with subtropical climate They are located near the tropics, encompassing coastal areas, islands, and low- and medium-altitude continental areas. This climate is notable for combining aspects of tropical and temperate climates, generating ideal conditions for a diversity of plant species. However, it also requires adaptation strategies that allow for tolerating both warm summers and moderately cold or dry winters.

• Average annual temperature: It usually hovers around 18ºC. The coldest month ranges from 6ºC to 18ºC depending on altitude and proximity to the equator.
• Seasonal instabilityAlthough temperatures do not usually reach extremes, the lower variability in autumn-winter can affect the development of exotic species.
• Precipitation: : the quantity and annual distribution vary according to the type of subtropical (humid or dry).
• frost: They can occur, especially far from the sea or at higher altitudes, although they tend to be mild. In some areas, lows reach -7ºC or even -12ºC, while in others they barely reach -2ºC.
• Humidity: It tends to be high in regions near the sea, facilitating the presence of morning dew throughout the year.

The subtropical climate is located in the balance between tropical heat and temperate coolness, providing advantages and challenges when selecting and caring for plants.

Types of subtropical climate and their zones

Humid subtropical climate

Also known as chinese weather, is present in:

• Eastern United States, especially the Southeast
• Southwest South America (Argentina, Paraguay, southern Brazil)
• Southeast Asia (China, Japan, South Korea in certain regions)
• Eastern Australia and Southeast Africa
• Some areas of the Mediterranean such as northern Italy or southern Ukraine
• Islands such as La Palma or El Hierro in the Canary Islands and parts of the Azores

Most representative characteristics:

• Heavy rainfall between 500 and 1200mm annually, with regular rainfall that favors lush vegetation.
• Ambient humidity greater than 70%, which promotes bushy foliage plants and continuous blooms.
• Average temperature between 16 and 22ºCIn coastal areas, frost is rare, but in inland or higher altitude areas, occasional snowfall may occur.

Dry subtropical climate

This type, also called Mediterranean climate, we find it in:

• Coastal areas of the Mediterranean Sea
• Southwest South America (especially central Chile)
• Western United States (California)
• South Australia and parts of South Africa

Its main features:

• Seasonal and scarce rainfall, predominantly in spring and late summer. Episodes can be torrential, although there are areas with up to 1000 mm of rainfall annually.
• High humidity in coastal areas, although it decreases the further we move away from the sea.
• Average annual temperature of 18ºC, but with hot summers and warm days (>22°C). In winter, moderate to severe frosts may occur, especially inland.

Both types of climate allow for lush landscapes, but the selection of plant species and cultivation techniques They must be in tune with the prevailing rainfall, temperatures and humidity.

Advantages of creating a subtropical garden and design criteria

The appeal of a subtropical garden lies in its Diversity of species, striking blooms, evergreen leaves and intense aromasHowever, to take advantage of the potential of this climate, some key elements must be taken into account:

• Selection of adapted species: Prioritize plants that tolerate both warm and cool periods, as well as alternating drought and humidity.
• Location planning: Choose the right location for each species according to its light requirements (sun, semi-shade, shade) and protection from wind or frost.
• Drainage and soil quality: It is essential to avoid waterlogging during rainy seasons and facilitate root development.
• Efficient maintenance: Choose species that require little watering and maintenance, or group those with similar needs together to make them easier to care for.

Taking advantage of native or naturalized plants in subtropical climates also helps reduce pests and create sustainable gardens.

Exhaustive selection of plants for subtropical climates

In subtropical climates, the range of suitable plants For gardens and terraces, the selection is especially extensive. Here you'll find a detailed selection, with descriptions, care, and ornamental and ecological uses for each type of garden, including both species native to subtropical areas and those best suited to home cultivation.

Fire treeBrachychiton acerifolius)

El fire tree It is an emblematic specimen of eastern Australia, fast-growing and leafy. It is distinguished by its spectacular red spring bloom, which completely covers the canopy and attracts pollinators such as bees and birds.

• High jump: Up to 40 meters in its natural habitat, commonly 15 meters in domestic cultivation.
• blade type: Deciduous or semi-deciduous.
• Environment/Atmosphere: Requires full sun and warmth during the summer, with mild winters. It can tolerate highs of 38°C and lows of -3°C.
• Ornamental advantages: Ideal as a single tree or for large gardens, due to its size and striking coloration.

Archontophoenix maxima

This Australian palm tree, uncommon in nurseries but highly appreciated by landscapers, can reach 25 meters and form part of tropical alignments or groups.

• Pinnate leaves up to 3 meters long and with a thin trunk (30 cm), ideal for small gardens.
• As a young child, prefers semi-shadeAs it grows, it tolerates direct sunlight.
• Requires frequent watering and well-drained soils.
• Moderate resistance to cold: withstands up to -2ºC for a short time.

Cane de Indias (canna indica)

Perennial herbaceous plant of South American origin, valued for its summer flowering in shades of red, orange, and yellow. It is a hardy plant and easy to grow in warm, humid climates.

• High jump: Up to 3 meters.
• Leaves: Green or two-tone (green and purple), wide and decorative.
• Need: Plenty of light; tolerates poor soils, but will appreciate regular watering.
• It tolerates mild frosts down to -2ºC, but may be affected by cold winds.

Gazania (Gazania freezes)

Originally from southern Africa, it is widely used as upholstery or borders. Their daisy-like flowers They open only to the sun and offer a surprising variety of colors.

• High jump: 30 cm high by 30 cm wide.
• Colours:Various, from yellow and orange, to pink and red.
• Requires direct sunlightIf it doesn't receive it, it doesn't bloom well.
• It supports minimum temperatures of -3ºC.

Fig tree (ficus carica)

A deciduous fruit tree that has accompanied the history of Mediterranean and subtropical gardens since ancient times. fresh and sweet figs in summer.

• High jump: Up to 8 meters, although it is possible to keep it low by pruning.
• Resistance: Very tolerant to drought, cold and frost down to -7ºC.
• Low maintenance, ideal for gardens where a productive and rustic touch is sought.

Lilo (Syringa vulgaris)

This European shrub-small tree stands out for its abundant spring flowering in shades of lilac and white, ideal for olfactory gardens and to provide shade and freshness in summer.

• High jump: 6-7 meters.
• It develops multiple stems from the base; easy to control by pruning.
• Slow growth: about 20 cm per year.
• Rusticity: It can withstand temperatures up to -18ºC, making it adaptable to various subtropical and temperate zones.

Common magnolia (magnolia grandiflora)

With its large evergreen leaves and fragrant white flowers, the magnolia tree is a symbol of elegance and distinction in large gardens and urban parks.

• High jump: Up to 30 meters, although in cultivation it usually grows 20-40 cm per year.
• Flores: Up to 30 cm in diameter and intense aroma, in spring.
• Needs: It prefers acidic soils (pH 4-6), high humidity and semi-shade in Mediterranean climates to avoid burns.
• It tolerates severe frosts down to -18°C; it is suitable for both humid subtropical and temperate climates.

Black branch (corymbosa senna)

South American shrub, semi-evergreen, appreciated for its easy maintenance and intense yellow flowering in spring.

• High jump: Up to 2,5 meters.
• Dark green bipinnate leaves.
• It tolerates pruning and all types of soil, except very heavy ones.
• Resistance: up to -10ºC.

Scented passionflower (Passiflora vitifolia)

Known as wild passion fruit, this Central and South American vine produces spectacular scarlet red flowers and can reach up to 8 meters in length if supported.

• FloweringIn summer, flowers up to 12 cm in diameter, very attractive to pollinators.
• Requirements: Plenty of light or partial shade; warm climate, although it tolerates short frosts of -4ºC.
• Suitable for pergolas, walls and natural roofs.

Elephant's foot cassava (yucca elephantipes)

A rustic and resistant plant, native to Mesoamerica. It is a succulent tree which stands out for its extreme rusticity and longevity.

• High jump: Up to 10 meters, although it usually branches and becomes lower if the lateral shoots are allowed to grow.
• Leaves: Green or green with whitish edges, lanceolate and prickly.
• Flowering: After about 10 years, in summer, with bell-shaped white flowers grouped in panicles.
• Needs: Full sun, very tolerant of drought and frost down to -4°C. It's perfect for those looking for low maintenance and a desert-like or modern-looking garden.

Other emblematic plants for subtropical climates

• Strelitzia reginae (Bird of paradise)Ideal for Canary Islands and mild subtropical climates. Its exotic orange and blue flowers add color and structure. It requires sun, moderate humidity, and regular watering in summer.
• Hibiscus rosa-sinensis (Hibiscus): Flowering shrub with spectacular large flowers, very common in gardens with warm and humid subtropical climates.
• Musa spp. (Ornamental banana): It requires warm temperatures and fertile soils. It is widely cultivated in the Canary Islands and other subtropical regions due to its rapid growth and large size.
• Phoenix canariensis (Canary Island Palm): Native to the Canary Islands, extremely resistant to both drought and humidity, and a symbol of exoticism for any subtropical garden.
• Laurel y subtropical cloud forestsOn some islands such as La Gomera, laurel forests represent a unique subtropical ecosystem, with large trees, vines and a diversity of species adapted to constant humidity.

All of these species can be integrated into private gardens, terraces, urban patios, or public spaces, as long as the sun, irrigation, and substrate conditions are adequate.

Additional recommendations for cultivation and maintenance

• Take advantage of biodiversity: Mix species from different origins but adapted to the climate, for an exotic effect and to reduce the impact of pests.
• Group by needs: Place plants with high water requirements together and separate those that are highly resistant to drought.
• Landscape design: Alternate low and ground cover plants (gazania, daylily) with medium shrubs (hibiscus, lilac) and tall trees (fire tree, magnolia, palm trees), generating vertical layers of vegetation and focal points.
• Frost preventionProtect sensitive specimens by covering the stem with mulch and placing them near warm walls.
• Avoid overwatering in winter, especially in dry subtropical areas, to prevent root diseases.

Adequate knowledge and planning are essential to enjoy colorful, healthy, low-maintenance gardens in subtropical regions. Selecting the right species and understanding their life cycles allows for the creation of true green paradises in both private and public spaces, contributing to sustainability and urban and rural beauty.