Answer can be directly harvested from the information given.

e.g.

Q1. What is the distribution of Ziziphus jujube?

Answer: They are in southern Asia, between Lebanon, northern India, and southern and central China, and possibly also southeastern Europe.

Answer can be obtained from the information given and the external links.

e.g.

Q2. What is the varieties of Ziziphus jujube?

Answer: Varieties of Ziziphus jujube include Li, Lang, Sherwood, Silverhill, So, Shui Men and GA 866

Question requires higher order thinking. More information should be found from external links or reference before answering the questions.

Q3. How to Germinate ziziphus Jujube?

Answer: There are a few steps to germinate ziziphus jujibe,

1)Gather jujube seeds in late summer or fall after the fruit ripens to a glossy, reddish-brown color and there are no hints of green left at the ends. Collect three or four fruits to increase the chances of finding one with a viable seed.

2)Score lengthwise around the fruit with a paring knife and pry the two halves apart to extract the large, light brown stone. Soak the stone in warm water for an hour. Gently scrub away any clinging flesh. Rinse them thoroughly and lay the seeds on a paper towel to drain.

3)Store the jujube stones in a paper bag away from moisture and direct light to allow the seed to finish ripening. Keep them in an area where temperatures stay around 70 degrees Fahrenheit, such as inside a kitchen cupboard. Move them to cold storage in two to three months.

4)Wrap the jujube stones in moist sphagnum moss and place them inside a sealable plastic bag. Leave the bag open 1 inch to allow excess moisture to escape. Store the seeds in the refrigerator for two to three months to cold stratify. Moisten the sphagnum moss whenever it feels barely damp.

5)Remove the jujube stones from the refrigerator after the cold stratification period has ended. Place them in a bowl. Cover them with just-boiled water and soak them for 24 hours.

6)Rub the side of each jujube stone with a steel rasp until a small hole forms or gently crack the endocarp with a handheld nutcracker. This is known as scarifying the seed. It weakens the endocarp, or hard outer layer, so the seed inside will germinate faster.

7)Sow the processed jujube seeds in individual 4-inch pots filled with sterile potting mix. Sow them 1/2 inch deep. Water each pot after sowing to help settle the soil.

8)Place the potted jujube seeds inside a greenhouse, insulated cold frame or indoors near a large, sunny window. Warm the pots with a germination mat set to 80 F during the day and 60 F at night.

9)Monitor the moisture level in the potting mix closely because it will dry out quickly with the warm temperatures. Add water whenever it feels mostly dry in the top 1/4 inch. Water until it feels moderately moist but not soggy in the top 1 inch.

10)Watch for germination in three to four weeks. Keep the germination mat in place for another two weeks, then begin turning it off during the day. Warm the pots at night for another week, then remove the germination mat completely.

11)Move the jujube seedlings outdoors to a warm, sheltered spot when outdoor temperatures are above 55 F at night. Transplant the seedlings into 2-gallon pots filled with potting soil once they produce several sets of mature leaves.