Aloe Vera is a plant added by Natura found in Desert.
They can be a great source of food (when placed on sand near water), yellow dye, strings, wool and decorative blocks (tumbleweed).
You can plant aloe vera seeds on regular dirt, sand and grass blocks (unlike most plants which require the use of a hoe on the ground first) and get a fully grown aloe vera plant in about 1 minute(tested 10 times at different places).
After harvesting the aloe vera plant, you can get 1 - 2 aloe vera seeds and grow another aloe vera plant. Also, after planted on dirt or sand, after a short time blue veins will appear on the block, which can then be mined for water droplets, which you can eat for a half food point.
If placed within 4 blocks of water (on the same mechanics as wheat), it goes into a second stage. Once the base grows, the plant produces tumbleweed at an alarming rate.
Once there is tumbleweed (Use axe for fast harvest) all around it, you can break the stem on top to get dandelion yellow dye.
As three tumbleweed can be crafted into 6 string, aloe vera fills all your string/wool needs.
You can obtain an aloe vera plant in two ways, finding a plant in the wild, or by crafting tumbleweed to get two aloe vera plants.