Green
peppers can be picked any time you want to pick them. Now would be good. Pick one of the "ripest" and taste it! I'll bet it's delicious. If you allow the
peppers to hang on the vine, they will most likely begin to turn from green to redish (not all cultivars will, but most). The longer you let them hang, the sweeter they will become. So again, pick one and see how it tastes.
Keep in mind that there's a limit to how much plant mass a plant in a pot can support. If you left all of the
peppers hang on, combined with the mass of the leaves and stems, there's only so much the root system (in a pot) can handle in terms of water transport, etc. Continual harvest lessens this load and allows the plant to continue
growing, flowering, and setting fruit. Most
peppers are "indeterminent" which means they'll continue to grow as long as conditions (light, temp) are within an optimal range. So picking smaller
peppers doesn't mean your total harvest will be low. Four 1/4lb.
peppers = one 1lb.
Happy harvesting & welcome!
(Also, if you wind up with too many to eat fresh, you can freeze the excess. Wash them, dry them, cut in halves or quarters, remove the
seeds (most of 'em), lay out on a cookie sheet in a single layer and put the cookie sheet in the freezer for about an hour or two. Then just pile them in a freezer bag, squeeze out as much air as you can, and throw the bag in the freezer. The point of freezing on the sheet is so they don't stick together as they are freezing. So when you need some
peppers for cooking, you just remove as many
pepper halves as you need.)