Thanks Elena and Tim for your responses! After given this subject some thought, I think I should rephrase the question to be:
Which following traits of daylillies improve with maturity and fertilizer assuming all other factors are constant?
1. Petals substance
2. Colorfastness
3. Sunfastness
4. Bud count
5. Color
6. Form including but not limited to teeth, edge, pattern.
7. Height
8. Foliage
Based on your observations of your seedlings in your garden, can you rate each trait as Yes, No, Maybe? Thank you!