Harvesting swiss chard –

Ready for harvest when plants are established (4-6 weeks after planting)
When the plants are about 9″ tall and the leaves are large enough to eat
Snap or cut mature leaves at the base near its connection to the crown
Harvest the biggest couple of leaves from each plant
Leave smaller inner leaves to continue growing. New leaves will grow for harvest in 1-2 weeks

Storing swiss chard –

Fresh is best for this vegetable, but here are some tips if you can’t cook the day of harvest.
Fresh Storage: Place in airtight bags or containers and refrigerate. Don’t crush leaves, but it’s ok to compress gently to save on bag space.

Using Swiss chard –

Sautéed Swiss Chard: Remove the stems from Swiss chard leaves, then chop the leaves into strips. Sauté them in olive oil with garlic, onions, and a pinch of red pepper flakes until wilted and tender. Season with salt and pepper to taste.
Swiss Chard Salad: Slice Swiss chard leaves into thin ribbons and toss them with a vinaigrette dressing, cherry tomatoes, cucumbers, and feta cheese. The hearty and slightly bitter leaves of Swiss chard make for a nutritious and flavorful salad.
Swiss Chard Wraps: Use Swiss chard leaves as a substitute for tortillas or wraps. Fill them with your favorite ingredients, such as roasted vegetables, grains, beans, or grilled chicken, for a healthy and gluten-free alternative.
Swiss Chard and White Bean Soup: Sauté chopped Swiss chard stems and leaves with onions, garlic, and carrots. Add vegetable or chicken broth, white beans, and herbs. Simmer until the flavors meld together, creating a comforting and nourishing soup.
Swiss Chard Stir-Fry: Stir-fry Swiss chard leaves and stems with other vegetables like bell peppers, mushrooms, and tofu or meat. Add soy sauce, ginger, and garlic for a flavorful and nutritious stir-fry.