After a disastrous first year last year, I fertilised with horse manure and fish blood n bones. This year I have had some better results, but a large number of individual plants just don’t grow, even though they are sat right next to good plants on the plot. I had similar experience last year.
I planted beetroot, and have had some good tennis ball size roots, but approximately 50% are still less than ping pong ball size after probably 5 months.
Similar with leeks. Some plants are growing well, whereas about 40% of them aren’t much bigger than when they went in the ground.
What makes some plants grow well, whereas other next door to them do virtually nothing?