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Zinnias
Zinnias are one of the most commonly grown annuals. You might know them under their Latin name Zinnia, but they're also called youth-and-age in some regions. These cheerful flowers belong to the Asteraceae family and originate from Mexico and Central America. Today, they're beloved by gardeners worldwide for their vibrant colours, long flowering period, and easy cultivation.
What Do Zinnias Look Like?
Zinnias are annual plants that typically grow 30-100 cm tall, depending on the variety. They have upright, sturdy stems and opposite leaves that are oval to lanceolate in shape. The flowers come in a wide range of colours – from white, yellow, and orange to pink, red, and purple. Some varieties even feature bicolour blooms.
The flower heads can be single, semi-double, or fully double, resembling dahlias or pompoms. Flowers typically measure 5-15 cm in diameter. The flowering period lasts from June until the first frosts, making zinnias excellent for continuous garden colour.
Popular Zinnia Varieties
There are numerous zinnia varieties available, differing in height, flower size, and colour. The most popular include:
- Zinnia elegans – the most common species with large, decorative flowers
- Zinnia angustifolia – compact variety with smaller flowers, ideal for borders
- Zinnia haageana – medium-sized with bicolour flowers
- Cactus-flowered zinnias – varieties with tubular petals resembling cacti
- Dahlia-flowered zinnias – with large, fully double flowers
Growing Zinnias
Location and Soil
Zinnias thrive in full sun – they need at least 6-8 hours of direct sunlight daily. They prefer nutrient-rich, well-drained soil with neutral to slightly alkaline pH. Heavy, waterlogged soils don't suit them as they can lead to root rot.
Sowing and Planting
Zinnias are sensitive to frost, so they shouldn't be planted outdoors until mid-May when the risk of late frosts has passed. You can either sow directly into the ground or start them earlier indoors:
- Direct sowing – from mid-May, sow seeds 1 cm deep with 20-30 cm spacing between plants
- Indoor sowing – in March-April, sow in containers and transplant hardened seedlings outdoors after the last frost
Seeds germinate within 7-10 days at temperatures around 20-25°C.
Watering and Fertilising
Zinnias need regular watering, especially during dry periods. However, avoid overwatering and wetting the leaves, as this can promote fungal diseases. It's best to water at the base of the plant in the morning.
For abundant flowering, feed zinnias every 2-3 weeks with a balanced liquid fertiliser or compost. High nitrogen content promotes lush foliage, whilst phosphorus and potassium support flower production.
Deadheading and Care
Regular deadheading is key to continuous flowering. Remove spent flowers to encourage the plant to produce new buds. Taller varieties may need staking to prevent stems breaking in wind or rain.
Common Problems and Diseases
Zinnias are relatively resistant plants, but they can be affected by certain diseases and pests:
- Powdery mildew – a white coating on leaves, caused by excess moisture and poor air circulation
- Leaf spot diseases – brown spots on leaves, often due to wet foliage
- Aphids – can attack young shoots and buds
- Spider mites – appear during hot, dry weather
Prevention includes proper spacing, watering at the base, and removing affected plant parts promptly.
Using Zinnias in the Garden
Zinnias are versatile plants suitable for various garden uses:
- Flower beds and borders – create colourful combinations with other annuals
- Cut flowers – hold well in vases for 7-10 days
- Container planting – compact varieties are ideal for pots and balcony boxes
- Attracting pollinators – flowers are highly attractive to butterflies and bees
Conclusion
Zinnias are easy-to-grow annuals that reward minimal care with abundant, colourful blooms throughout summer. Their wide variety of colours and forms makes them suitable for any garden style. Whether you're a beginner or experienced gardener, zinnias are an excellent choice for creating a vibrant, lively garden.
Description of Zinnia (lat. Zinnia) is one of the most commonly grown annuals in our gardens. It belongs to the Asteraceae (lat. Asteraceae) plant family. The species grown in our gardens is Zinnia elegans. Among growers, the common name "zinnia" derived from the Latin name is widespread. Zinnias are available in several variants, which differ mainly in flower structure. Choose the one that suits your garden best. If you can't decide, buy a seed packet labeled "mix". In it, you'll find the most beautiful zinnia varieties.
In the following article, you'll learn about types of zinnias as well as their cultivation. Let's start, however, in proper order with a brief introduction to this very interesting flower, which after blooming can also decorate your home in a vase for a long time.
Zinnia, that's my name...
Zinnias are annual plants that grow to a height of 40 - 90 cm depending on the specific variety and growing conditions. Zinnia stems are hairy and sparsely branched. Leaves grow opposite, are sessile, and broadly elliptical in shape. Flowers have various shapes and colors. You can find pompom, dahlia-like, and cactus-flowered blooms. The size of the largest flowers can be up to 10 cm in diameter. Flower colors are very diverse thanks to continuous breeding. The only thing that hasn't been achieved yet is the cultivation of blue and black zinnias. In the future, even that may not be impossible.
Fresh zinnia flowers can also be used for fabric dyeing, with red and yellow flowers being most suitable...
A beauty originally from Mexico now commonly grown in our gardens
Zinnia has its original habitat in Mexico. It has gained great popularity almost worldwide, mainly due to its resilience and beautiful flowers. In our country, its cultivation is very popular. Zinnia flowers can be seen in almost every garden where annuals are grown.
Zinnias love sun, give them as much as possible.
Types of zinnias
Zinnia elegans pompom-flowered has a very interesting, full flower. The marginal petals are large, the inner, dwarf petals form a central pompom. Flower colors vary, with shades of red, orange, and pink appearing most frequently.
Zinnia elegans dahlia-flowered is the most commonly grown variety. The petals are all approximately the same size, forming a rich flower in various colors. The cultivar Peppermint Stick has striped flowers, and variants with orange, purple, red, and white-yellow flowers are also available. Flower beds with zinnias shining in all colors can be grown from seeds labeled Mix.
Zinnia elegans cactus-flowered has individual needle-shaped petals, allowing you to enjoy a wide palette of flower colours from a single seed packet.
Zinnia elegans californian closely resembles the dahlia-flowered variety in appearance. The flowers are large and full with approximately equal-sized petals.
Zinnia elegans lilliput grows to only a small height thanks to breeding. However, the compact size doesn't change the fact that the flowers are just as magnificent as those of other varieties.
Zinnia variety Peppermint Stick has striped flowers
Growing Zinnias
Growing zinnias is not complicated at all - even a complete beginner can cultivate beautiful flowers in the garden. Zinnias, due to their Mexican origin, love sunny and warm weather, so give them as much sunshine as possible. Conversely, in a rainy summer you'll likely see vigorous plants but fewer flowers. Unfortunately, the weather cannot be influenced. The only thing you can do for zinnias is plant them in the warmest spot in your garden. Protect zinnias from strong winds that could break the plants. Besides sunshine, zinnias need nutrient-rich, well-drained and warm soil for successful growth. Never plant zinnias in shady, damp locations, as the flowers would certainly not bring you joy and moreover the plant could rot or catch a fungal disease.
Zinnias are best started indoors
Zinnias belong to plants that are best started indoors before transplanting to the flower bed. Seeds are sown in seed trays during March to April. Sown seeds are spread over the surface of the substrate, they can also be covered with a thin layer of soil. The ideal temperature for seed germination is around 20°C. Sufficient moisture also contributes to good germination. Germinated seedlings must be pricked out into pots or a larger tray so they have enough space for further development. Mature seedlings are planted in the flower bed only at the end of May, as zinnias are sensitive to frost. However, zinnias can also be grown by those who don't have the option to start seedlings indoors. The second sowing option is direct sowing in the flower bed during April, or even until June for autumn flowering. When sowing directly in the flower bed, maintain sufficient distance between seeds so you don't have to prick out unnecessarily.
Slugs love to feast on young zinnia leaves.
Slugs: A Threat to Young Eryngium Seedlings
Eryngium plants are relatively resistant to diseases and pests when grown in suitable locations. The only major threat comes from slugs, which love feeding on the leaves of young seedlings. Sometimes this can have fatal consequences for the plant - biting off the growing tip and subsequent death of the plant. Possible prevention includes systematic slug control, using proven recipes in the fight against slugs, and planting larger seedlings that slugs are less likely to attack.
Eryngium lasts a long time in a vase.
Vigorous Growth and Healthy Plants Are the Result of Exemplary Care
Beautiful, lush plants are the result of all-season care for eryngiums. Eryngiums should be hoed and weeded throughout the season. On warm days, eryngiums should also receive a regular supply of water. Eryngiums love water, but there shouldn't be too much of it. Flowering can be supported by adding fertilizer designed for garden flowers to the watering. It's ideal to regularly rotate the planting site to prevent the development of diseases and pests.
Eryngium repels nematodes, so you can plant it as a preventive measure in vegetable beds...