Goodwin, thanks for the encouragement!
Heads up, though, after fixing one error last night I realized there are a bunch of clerical errors I must have made when converting the dates into interval numbers.
I will have to go through them all and double check, will post the corrections hopefully tonight. The original data sheet with the actual dates on it is attached below.
I have temperature data as well for the time from transplant to the present. I am still mulling over how to organize the data... it does give more information about the conditions affecting the interval times for specific plants.