How to Grow Water Caltrop (Bull's Head Caltrop)? Detailed Planting Methods and Techniques
I. Choosing the Caltrop Pond
When growing water caltrop (bull's head caltrop), choose ponds, river bends, relatively low-lying water surfaces, or lake edges with a water depth of 0.3 to 4 m, relatively fertile silt, relatively small wind and waves, and gentle water flow; the underwater silt should be about 20 cm deep.
II. Sowing Method
Before growing water caltrop (bull's head caltrop), apply fertilizer in advance; you can apply pig manure or decomposed mud manure. When planting, first divide the caltrop pond into lengthwise rows according to its terrain, with row spacing of 2.8 m to 3.3 m. Insert bamboo poles at both ends of the caltrop pond and stretch ropes between them as markers, then use a boat to scatter the seed caltrops evenly into the water along the ropes. During sowing, the water level should be kept at 85 to 100 cm; after the caltrop seedlings grow above the water surface, gradually deepen the water level.