How to replace spring greens in daily diet?

[Aga]

Unfortunately spring greens are not available in my place. How can I replace them in daily diet?
I know that veggies that can be given daily include celery, pepper, ciliantro, cucamber but I have a problem with greens...

 

[Mother Hubbard]

You don’t have to feed spring greens, a balanced veg diet is important, reducing high calcium veg content I believe is important.

 

[VickiA]

Long Term Balanced General And Special Needs Guinea Pig Diets
Edible And Forbidden Veg And Fruit List With Vitamin C Grading

Here are the links to the long term balanced feeding guide and also to the list of veggies and fruit.
Variety is important, but you only need a small amount of veg each day as 80% of the diet is hay, 10% veg and 10% pellets. Please consider the calcium content and only feed high calcium veg as an occasional treat in small quantities.