引用自 Leafreo：

The command to spawn the different saplings is the following:

/spawnitem sapling 1 '{"stemName":"kelp","stemHueShift":0.0,"foliageName":"kelpy","foliageHueShift":0.0}'

* To spawn items you must be in admin mode.

stemName: Form of the stems.

• kelp
  
• seaweed
  
• toxickelp

foliageName: Form of the foliage.

• kelpy
  
• flowy
  
• wavy
  
• toxickelpy

You can make different combinations of stem, foliage and their colors. For color codes you can try the following value examples:

引用自 u/Nexdominus：

[-180(dark blue), -135(dark purple), -90(light purple), -45(reddish-brown), 0(brown), 45(light green), 90(dark green), 135(teal), 180(light blue)] other values work as well such as 255, -300, 341, 117, -26 etc...