Some spinach plants not thriving like the others
Hello! This is my first spring planting an organic garden, and I am wondering about the growth of some of my spinach plants. One or two of them, to one side of a midsize tree, are growing tremendously. The only problem I find with these bigger plants is that the leaves are sometimes either sun damaged or nibbled upon. Not a large critter most likely, as I personally installed a deterrent fence around my raised beds to keep squirrels and birds out. Still - I don't ever see any insects - flies or caterpillars - on or around these plants at all. So I am unsure what is causing that "nibbled" appearance on the leaftips. Well, anyway, I have four or five other spinach plants that have germinated to the other side of that same tree, but refuse to grow taller than two or three inches. Their leaves pale in comparison to the others' which are five or six inches tall and about a foot wide, and I am truly perplexed as to why--they have identical tilling procedures and soil amendments, and it looks like they get the same amount of sun; and I know I water them fairly equally. Neither has had any fertilizers nor pesticides applied. What gives? This is in zone 9a. Any help you can offer to expedite the plants' growth would be much appreciated!