Hi Gisette,
That's Bright Lights swiss chard. I've got red, yellow, white and pink growing. I like sauteed swiss chard so it needs to grow more before I pick it. Stays nice, tender and mild grown inside.
Beth
Nice to know, Beth. Mine got pretty tough outside, especially in summer. Though one grown behind tomatoes in a GrowBox got enormous while I couldn't reach it. They love, love, love the dolomite fertilizer. 
Aha! You cheat and give bonus under-canopy lights to your tomatoes and peppers!
Well done!
Beautiful chard!
Gisette,
Forgot to thank you for the lime tip - swiss chard seems to like that addition!
Beth
You're welcome. Definitely on the chard and lime.
Spinach likes it too.
I was surprised. The first year I had my growboxes, one had two big tomato plants, but I left one chard in the back, thoroughly shaded by a massively squat 70-tomato-yielding semideterminate. That chard was huge. And it didn't slow down the tomato any.
Swiss Chard prior to and after second harvest. Another 13 ounces (bag full) enough for 2 sauteed servings. Big Duh moment. Why was I dragging the SC on and off the shelf onto the bread trays when I had an area vacated by the cucs? All I had to do is slide the bread trays under the lights! Now I have another shelf for seed starting!
, Beth! They still look great! And I'm sure your seedling shelves are getting crowded. 
None of my chard seeds have come up outside yet. Didn't really expect them to in only 2 weeks at these temperatures... But my first crocus bloomed today - aw! And one of the overwintered pansies has opened a new bloom, yay!!! Rough winter, to have no pansies bloom until March! I usually get a few brave little displays on and off all through winter...
Could the chard just go outside to play in the spring sunshine?
Looks happy and delicious. 
Hi Gisette,
I put the swiss chard outside last year on the patio. Big mistake. It became the worlds biggest aphid magnet. I guess the tender growth from growing inside was irresistable. Then the aphids got inside the basement and onto the AG lettuce. So, one last taste of swiss chard and it goes into the compost pile....








Fungus Gnat Control - Beneficial nematodes is where we discussed your 72 quart planter.
Pretty, pretty chard. Eaten any yet? Are there just the two colors? That red is so vivid!