It's a digression from the subject of nursery, but for those of you who are curious about the idea of learning to read later than it's taught in school, here's a link which may interest you: www.psychologytoday.com/us/blog/freedom-learn/201002/children-teach-themselves-read
The article isn't about home education in general, but rather focuses on a particular type of home education in which the children themselves drive the education process. They decide when they want to read and how they want to do it.
It's a summary of anecdotal accounts of how children learned to read, together with the author's own conclusions about it. For example, he observes that for children not at school parents report that there's no great disadvantage or lasting impact in learning to read later rather than earlier. Of course it's a totally different story at school: at school, the curriculum is increasingly delivered via the medium of reading and writing, so that an illiterate child will struggle to access pretty much the entire curriculum, and also illiterate children who spend much of their in an environment which prizes early reading skills are bound to feel like failures. But it's a mistake to generalise this and conclude that later reading is harmful per se. That certainly isn't what most home educating parents have found. Kids who have easy access to information and instruction in other formats can be educated quite adequately for a number of years even if they can't read. When they do take an interest in reading, they may pick it up remarkably fast.
Among my acquaintance, seven seems like the most popular age for home ed children to learn to read, but it varies widely. My eldest dabbled with the idea of reading on and off from the age of three but always gave up upon realising that it wasn't effortless. At 6.5 she decided to work properly at reading, but TBH now I think she still wasn't developmentally ready and was only doing it because of peer pressure. (She was quite a conformist and knew that schoolchildren read earlier, and her best friend had been reading fluently since toddlerhood.) She made very slow steady progress and I was never worried about her reading, but it was a hard slog for her, unlike many of her home ed peers who go from zero to Harry Potter in less than a year (not uncommon when kids learn to read under their own steam at seven or later). It all fell into place for her at last around her ninth birthday when she was finally able to read the chapter books she wanted to read. Since then it's been smooth sailing. She's just sat her English Language IGCSE with virtually no preparation, having got quite high marks in mocks.
So the experience of @bebanjo is not at all unusual in home ed circles. For us, there's less need for children to acquire specific skills at certain ages than there is for schoolchildren who are learning via large-group age-segregated instruction. We can afford to wait until they are very keen and definitely ready.