The Gene Design Lab is a lab equipment used for engineering new strains of plants and seeds. It's the tier 3 crafting station for plant seeds. It allows you to create new Crops from raw materials like Genes, Genetic Material, Tissue Culture, and other Seeds.
The genes required to craft the seeds are derived from extracting other seeds in the Sprouting Table/Xeno Research Lab/Advanced Xenolab. Alternatively, once you've discovered a gene you can craft them at the Gene Sequencer.
Upgrades from Botany Lab Edit