Clear vinyl propagation domes are essential for maintaining high humidity and temperatures to boost seedling germination and clone rooting. Designed to fit standard \(10\text{--}inch \times 20\text{--}inch\) trays, these clear plastic covers allow light penetration while maximizing moisture retention. Available heights typically range from 2.5 inches to 7 inches, with common features including adjustable vents and ribbed designs to prevent water pooling.