Which flower varieties are difficult to grow and easy to kill?

Anyone who has grown plants has surely killed a few. When you first start growing flowers, you pay no attention to care techniques at all, you just chase after whichever flowers look pretty and buy them, and the result of caring for them that way is almost always certain death, especially with the few notoriously hard-to-please flowers I mention below.

Gardenia

Many flower lovers are drawn in at first glance by the deep green leaves and the richly layered blooms of the gardenia, and up close there is a strong floral scent. Yet for growers in the north, this plant is a nightmare. Gardenias are naturally fond of acidic water and humid environments, while the soil and water in the north are alkaline and the air is relatively dry, which is extremely stressful for its growth, so you end up with yellowing leaves and dropped flower buds.

How to grow it? Give it what it likes, of course. Not only should you choose acidic fertilizers most of the time, you should also regularly spray the plant with citric acid, and when the air is dry you need to use a humidifier to raise the air humidity.

Camellia

Camellia is a flower whose blooms are mostly white, pink and yellow in tone, with petals edged with streaks or patches of pink, red and yellow, so every flower looks distinctive, and it is also one of the few large double-flowered types. Beautiful as the flowers are, the bud development period is very long, at least 6 months, comparable to a "ten-month pregnancy", and growing it well also requires getting watering, light and temperature right, so it is hard to please.

How to grow it? Camellia likes loose, fertile, well-draining, airy, humus-rich, slightly acidic soil, and it also needs a consistently moist environment long term; if the moisture goes from dry to wet and back before it blooms, the buds easily drop.

Rieger begonia

Rieger begonia is an extremely vivid flower, and many people think at first glance that it is a summer flower, but in fact what it fears most is heat. In summer and autumn, or in hot, humid, stuffy conditions, it often shows yellowing leaves, leaf drop and even death, and beginners generally cannot keep it alive.

How to grow it? When the weather is generally rather hot, as it is now, its root system's ability to absorb drops, so it needs to be placed somewhere relatively cool, watered only when slightly dry, and never watered at noon; it is best done at 9 in the morning or 8 at night.