What are the latest propagation methods for miracle fruit?

Miracle fruit (Synsepalum dulcificum) belongs to the Sapotaceae family and is a tropical evergreen shrub, also known as miraculous berry. It is native to the regions of West Africa, Ghana, and Congo. It prefers high temperatures and high humidity, with an optimal growth temperature of 20-30°C. For field planting, well-drained acidic sandy soil rich in organic matter with a pH of 4.5-5.8 is used. The main propagation methods are seed propagation, cutting propagation, and air layering propagation. Let's take a look at the propagation methods of miracle fruit together!

Seed Propagation of Miracle Fruit

Seeds are collected from fresh ripe fruit. Before sowing, rub off the flesh with sand, peel, wash, and disinfect. They should not be stored for long. Sow about 300 seeds per sq m, cover with 2 cm of fine sand, and keep the sand bed moist. They germinate in about 15 days, with a germination rate of over 100%. After seedlings emerge, spray with 0.2% urea or potassium dihydrogen phosphate once a week. When seedlings reach 6-8 cm in height and grow 4-5 true leaves, transplant them to the nursery for continued management. Before sowing, prepare the seedbed with clean, loose culture soil as the substrate. Broadcast or sow in spots on the seedbed, cover with 2 cm of soil after sowing, control the temperature at 26-28°C, and keep the culture soil moist. They will germinate in 60-80 days. When seedlings have 4-5 true leaves, they can be transplanted with a soil ball into pots or nutrient bags filled with culture soil for cultivation and management. Seedlings grow slowly.

Cutting Propagation of Miracle Fruit

For cutting propagation of miracle fruit, from April to June, cut semi-lignified or fully lignified branches of the current year as cuttings, about 15-20 cm long, keep the leaves on the upper 1/3 of the cutting, cut each leaf in half, cut the lower end of the cutting into an axe-shaped 45-degree slant, and soak the slanted cut end in a hormone solution (NAA 1000 mg per liter, i.e., 5000 times dilution) for 3-5 minutes, then insert it into clean sandy loam soil. Treating miracle fruit cuttings with hormones not only promotes rooting but also results in a high rooting rate, early rooting, and early new leaf bud sprouting, significantly better than direct cutting. The cutting bed should maintain a suitable relative humidity above 80% and 75% shading conditions. Roots will form in about 50-60 days, with a 70% rooting rate. After new roots form, transplant into nutrient bags and maintain in the nursery. Cutting-propagated plants can finish earlier and can be dwarfed in tree shape. Alternatively, use 863 rooting powder solution for soaking to promote rooting.

Air Layering Propagation of Miracle Fruit

For air layering propagation of miracle fruit, from April to July, select healthy 1-2 year old mature branches for layering treatment. Roots will form in 60-70 days. The length of the girdling cut for air layering is 3-4 cm. The upper and lower cuts of the girdle should be neat, reaching deep into the xylem, remove the bark, and scrape off the cambium clean. Because miracle fruit has hard wood, aerial layering is difficult to root, and the propagation success rate is low. Therefore, at the girdled area, first evenly spray the prepared rooting powder at 500 mg per liter or IBA at 500 mg per liter onto the cultivation substrate. The substrate moisture should be such that it holds together when squeezed by hand without falling apart. Use cotton to wipe the prepared rooting solution once over the girdle cut, shape the substrate into a fist-sized ball, and wrap the substrate around the girdle cut with plastic film. Check moisture every 10 days; if it becomes dry, inject clean water with a syringe. When new roots grow to a yellow-brown color, the layered branch can be cut off and temporarily planted in nutrient bags or pots, maintaining a certain degree of shade and humidity. Before final planting, gradually reduce the shade level for the temporarily planted seedlings.