| bradford | Fits Bradford's hydrotime model |
| centaury | Temperature example dataset |
| grasses | Water potential example dataset |
| huidobro | Fits Garcia-Huidobro's thermal time model |
| physiodata | Transforms dataset to physiodata format |
| physiotime | Fits physiological time seed germination models |
| seedr | seedr: Hydro and Thermal Time Seed Germination Models in R |