It is suitable to grow under moist and fertile mixed coniferous and broad forests on shady or semi-shady slopes.

The red douglas fir is suitable for planting all over the north and south of China, and has the characteristics of shade-loving, drought-resistant and cold-resistant. Habitat tolerance of shade, dense forests can also grow under the perennial, not forest. It is mostly found in mixed coniferous and broad forests dominated by red pines. Born on the top of the mountain stony or barren soil, mostly in the form of shrubs.

Prefer cool and humid climate, can withstand temperatures below -30 ℃, cold resistance, optimal temperature of 20-25 ℃, is a shade species. Like wet but afraid of flooding, suitable for planting in loose moist well-drained sandy loam.

The wild redbud is the world's worst regeneration ability, the slowest growth rate of tree species. It takes 10 years to grow 1 centimeter in diameter. Recognized as an endangered natural rare cancer-fighting plant in the world, the sequoia is an ancient relict tree species left behind by the Quaternary glaciers, and in 1994, it was designated as a first-class protected species in China.

Expanded Information:

Cultivation Precautions p>Cultivation Notes

1, cedar tree due to small to pay attention to the regulation of light, need light but not too long in the strong light, summer and fall every day before ten o'clock in the morning or five o'clock in the sun after two hours or so can be. Usually more to receive diffused sunlight.

2, the new bonsai such as the emergence of young leaves dull yellow without luster, new tops of the top of the heart of the phenomenon of atrophy is generally too much watering too hard too much soil slate impermeable to make part of the root rot, the symptoms of light should control the amount of watering, and hard and blunt object gently pick the loose potting surface surface of the topsoil, so that potting soil breathable, every night to move to a place where you can accept the dew, the morning at 8:00 am or 9:00 pm moved into the shade, is conducive to the restoration of the roots of the growth of the health of the system.

3, the old leaves from the bottom up yellow leaves, but the new leaves are generally normal growth, usually watering is not a one-time watering, watering the amount of water is too little root water shortage caused by. Sometimes the top leaves dry and curled, touch dry leaves fall, but the old leaf growth is normal, generally also due to lack of water at the root, should be a one-time watering.

4, the cedar is suitable for weakly acidic soil, such as long-term watering with alkaline water, will cause the leaves from green to yellow, and even leaf loss, due to the addition of acidic nutrients or two thousandths of a ferrous sulphate solution spraying leaves or pouring potting soil, once every ten days for three consecutive times. Can make the leaves return to green due to alkali yellow.

5, every year in March and April, the red cedar will sprout a lot of shoots, will consume a lot of nutrients, this time you can grow towards the inside of the shoots removed, to prevent the branch shape is too dense and airless to make the foliage yellowing or fall off. The cross branch, inward branch pruning, can improve ventilation and light, and can save water and nutrient consumption, in the shoots just sprouting foliage is best not to spray liquid fertilizer, or in the root watering thick fertilizer.

Baidu Encyclopedia - Sequoia

People's Daily Online - Eight hundred years of Sequoia trees grow in villagers' homes