Since these new crops are permanent ones, they have mastery enabled too and below you can see the number of crops you need to harvest for each mastery level:
FarmVille Spinach
Level 1: harvest 300 crops
Level 2: harvest 600 crops
Level 3: harvest 900 crops
FarmVille Carnival Squash
Level 1: harvest 2,000 crops
Level 2: harvest 4,000 crops
Level 3: harvest 6,000 crops
Will you start seeding these new crops or you’ll focus on the ones needed for the goods?