I am planning to perform transcriptomic analysis, but I am unsure about which stage of the plant or leaf tissue would be most suitable for sampling. Additionally, I am confused about what the specific details are that . I should provide it to the vendor when requesting de novo transcriptome sequencing and analysis of my samples. Since I am new to transcriptomic studies, I would greatly appreciate guidance on the appropriate stage of tissue collection and the essential information that needs to be communicated to the sequencing facility.