it depends on how much time you have to spend on the challenge & how many other people are also doing it.  Plus how much patience you have lol!!  I did it in 2 parts with the topiary before & in the middle of doing it.  Good luck!

Might a person be able to complete it in about 2 months?  More?  Less?

I started on April 11, 2021 and finished on March 11, 2022. 

I did take a break from October 11, 2021 to January 30 2022 to grow pumpkins, do the Holiday Calendar and build snowmen.

In order to get the Special Reward for completing the Dino challenge which is a Free Superfood Weekend (48 hours) every month, you need to have 40 of each and every dinosaur spotted in your own garden, including the T-Rex.

I do not buy gold so could only use Regular and Organic food and limited sprinkles.  If you buy gold and can use unlimited sprinkles, it helps.  But you also need to take into consideration the amount of time it takes to grow the required plants to attract the required wildlife to your garden each week (they change every Sunday), as well as needing to spot 5 of each dinosaur in other gardens to build dino nests in your own garden.

Thanks so very much for providing detailed information, Marie.  It's exactly what I need to know.  I thought it would be a long challenge as I don't buy gold either. Your answer is spot on for me.  My daughter also wants to do the challenge so we'd do it together and want to plan ahead since each of us currently have challenges that we are slowly finishing.