A beginner’s guide to growing American mulberry trees:
1. Propagation Methods
Seed Propagation
American mulberry trees can be propagated by sowing seeds to obtain smaller trees. When the fruits are fully ripe, collect the seeds from the pulp, clean them, and let them dry.
In spring, prepare moist sandy soil and a pot. Soak the seeds in warm water for a day to germinate.
Then, sprinkle them into the pot, covered with a thin layer of fine sand. Use a plastic bag to seal the pot and keep it in a cool place indoors. After about a week, the seeds will germinate and sprout.
Cutting Propagation
With regular mulberry tree maintenance, you can prune healthy branches each spring for propagation. Generally, cut branches that are 20-30cm long, leaving only the leaves at the top.
Make a slanted cut at the bottom, and soak the pruned branches in a 0.2% root-stimulating powder solution for 10 minutes, then remove and let dry.
Prepare clean river sand and place it in a flower pot. Keep it in a cool place for about two weeks, and the mulberry branches will start to root. You can use a mixed soil for planting, and with proper care, the tree should bear fruit in its second year.
2. Caring for Your American Mulberry Tree
Planting Location
The location of your American mulberry tree is crucial as it directly impacts the tree’s growth, fruiting, and productivity. Mulberry trees thrive when two essential criteria are met:
Sunlight: Ensure the tree receives a minimum of 5 hours of direct sunlight daily.
Well-drained Soil: American mulberry trees are susceptible to disease and stunted growth if planted in damp, poorly drained soil.
Choose a Large Container
American mulberry trees have a robust root system to support the tree’s nutritional needs. Therefore, they require a large container with a diameter of at least 50cm x 50cm and a depth of 40cm or more.
Alternatively, you can use V6 growing pots with a diameter of 95cm or plastic drums with a capacity of 150L or more. If using drums, remember to drill drainage holes to ensure proper ventilation and prevent waterlogging.
Watering
American mulberry trees prefer dry and well-ventilated conditions but require sufficient water to prevent leaf and fruit wilting and ensure optimal nutrient absorption. Here’s what you need to do:
Water the tree daily, with the amount ranging from 2L to 10L per watering, depending on the size of the growing tree.
During the rainy season, cover the pot to prevent continuous moisture, which can cause root rot. You can skip watering or extend the interval between waterings based on the soil’s moisture level.
Since the tree is container-grown, cover the pot with straw or organic materials like leaves and bean husks during the dry season to maintain moisture.