To grow flowers, you need to know flowers in order to keep a good balance of soil acidity and alkalinity.

It is also important to understand the adaptability of flowers and plants to soil acidity and alkalinity. After long-term cultivation and exploration, especially according to the primary environmental and soil conditions of some flowers and the types of associated plants, we should judge their adaptability to acid and alkali in order to make flowers grow better. According to cultivation exploration, most ornamental flowers like acidic to slightly acidic soil conditions, and some of them are suitable for neutral or slightly alkaline conditions.

Why is it necessary to explore the adaptability of flowers and plants to soil salinity? Because soil pH directly affects the absorption of nutrients and the growth and development of flowers and plants, but also affects the availability of various nutrients in the soil. How the pH of the substrate of herbaceous flowers has a direct impact on the growth of flowers, pH is not suitable, will seriously hinder the growth and development of flowers; affect the absorption of nutrients by flowers and plants. Such as acidic flowers planted with alkaline soil, or long-term watering with alkaline water, will cause iron deficiency, and make the leaves yellowing white, or even dry.

How to adjust soil acidity and alkalinity reasonably?

1. Quicklime can be applied to reduce soil acidity, and the amount of application depends on soil acidity, 20-50 kg per mu.

Flower cultivation: adjust the acidity and alkalinity of soil matrix with aged vinegar

2. Reduce soil alkalinity.

① application of sulfur powder: the amount of application depends on the alkalinity of the soil, 1kg / 100m2.

② aluminum sulfate (alum): if you need to reduce the PH value from 7 to 6, 0.5kg aluminum sulfate can be applied per 100square meters.

③ application of humic fertilizer: there are more humic acid in humic fertilizer, which can adjust the acidity and alkalinity of soil to make it neutral.

Soil pH of flowers and plants

Prevention and control methods of acid and alkali damage of flowers:

1. Acid damage control for neutral or slightly alkaline flowers, alkaline fertilizers such as lime, limestone powder and plant ash can be applied to reduce soil acidity.

2. Alkali damage control for open-field flowers, 0.25 kg sulfur powder or 1.5 kg ferrous sulfate is generally applied every 10 square meters; for potted flowers, a mixture of river mud, rotten leaf soil and coarse sand can be used. 0.5 grams of 1.0 grams of sulfur powder or 1.5 grams of 2.0 grams of ferrous sulfate were applied in each kilogram of soil, mixed and stacked for 2 weeks.

Soil pH of flowers and plants

Flower cultivation: adjust the acidity and alkalinity of soil matrix with aged vinegar

The most common method to distinguish soil acidity and basicity is the determination of PH test solution. Mix the soil with cold boiled water at the ratio of 1:2, pour out the soil solution into glassware after precipitation, tear off a commonly used pH test paper, immerse it in the soil extract to be determined, take out half a second later, and compare it with the standard version, you can read out the pH test value. To put it simply, PH 7 is neutral, less than 7 is acidic, and more than 7 is alkaline. According to the situation of soil acidity and alkalinity in China, it is divided into five grades: ph 6.5-7.5 is acidic soil, if PH value is 7.5-8.5, it is alkaline soil; if PH value is 5.0-6.5, it is acidic soil; PH value less than 5.0is strongly acidic soil, PH value more than 8.5is strong alkaline soil.

Acid-base preference of bonsai green plants

Taxonomic list of acidophile and alkaloid flowers:

Like acidic flowers:

Rhododendron, Camellia, Tea Plum, Red Maple, Magnolia, Milan, Gardenia, Pearl Orchid, Begonia, Begonia, Davidia, Golden Flower Tea, Pot Orange, Cherry Blossom, Pine Pine, Pineapple, Fern, Lily, cyclamen, Primrose, Palm Rohan Pine, and most foliage plants.

The flowers that like alkaline are mainly:

Pomegranate, elm leaf plum, oleander, forsythia, wood incense, Chinese wolfberry, hibiscus, hibiscus, wisteria, Yingchun, cloves, du pear, acacia, paulownia, fig, Tamarix, black pine, apricot, pear, rose, dragon cypress, week cypress, Platycladus orientalis, torch tree, cactus, cactus, etc.

A flash in the pan

Here is a more detailed classification:

All kinds of flowers and trees adapt to soil acid and alkali situation table!

Soil acidity and alkalinity is a term to measure the content of acid and alkali in soil.

PH value is a symbol of acid-base degree, and its corresponding value with acid-base is as follows:

The soil whose PH value is less than 7 is acidic soil, and the soil whose PH value is more than 7 is alkaline soil.

All kinds of flowers and trees adapt to soil acidity and alkalinity table:

Acid-resistant flowers and trees (PH4-5) rhododendron, cyclamen, gardenia, colored leaf grass, purple duckweed, ferns, orchids and so on.

Suitable for weak acid flowers and trees (PH5-6) immortal visitors, begonia, Zhu Dinghong, primrose, camellia, jasmine, Milan, five-needle pine, lily, gladiolus, palm family, Magnolia, big rock tree and so on.

Adapt to neutral slightly sour flowers and trees (PH6-7) chrysanthemum, asparagus, rose, daffodils, hyacinth, sweet-scented osmanthus, spring of the four seasons, Tianmen winter, poinsettia, inverted golden bell, taro, magnolia, purple magnolia, sticking begonia and so on.

Suitable for neutral slightly alkaline flowers and trees (PH7-8) rose, carnation, geranium, cactus, spring, yellow poplar, southern bamboo, sweet pea, elm leaf plum, juniper and so on.