This task implies action with ordinary fractions. So, we have two types of flowers: Narcissus and Irises. The number of daffodils we know. We do not know how many irises in the flower garden, but we know that they are 2/7 of the total number.
To solve the problem, we make a simple equation, where x is the total number of colors:
x-2/7x = 35.
5/7x = 35
x = (35*7)/5
x = 49.
So, the total number of colors in the flower garden is 49 seedlings.
Answer: 49 colors.