For my own part this project is being stepped up for 2018. I have already begun to do this by preparing the two allotment 'Raised Beds' for planting potatoes and onions - the two easiest things to grow on an allotment not needing quite so much attention as some things.
At home I have now built three new raised beds in the back garden, and have one more to do in the front garden (which is south facing and thus gets more sun). There will be four raised beds and a planter in the rear garden and two raised beds in the front garden. I have also room at the bottom of the back garden (which does get the Sun) for another raised bed.
A strawberry bed has been prepared, next to which is a raspberry bed; these are planted and ready for the growing season. The planter has to be prepared since I have taken out the old soil and will replace it with new. This year I am going to avoid using the bagged 'compost' which has the square root of nothing in it nowadays. Growing with this over the past few years has shown this to be true and these are a waste of money unless you pay for very expensive bags - which I have no intention of doing. Also, the 'topsoil' bought cheaply in these bags is often little less than powdered brick-dust and building waste, and again this will be avoided.
The 'compost' and 'top-soil' can be got from any woodland; this woodland soil has far more nutrients because it contains so much recycled leaves and wood. May be a bit acidic due to this but lime can be added if necessary. This is another experiment, but one which should make growing conditions much better. Putting sharp sand into the ground is the best way to treat clay soil, which mine is and which is very heavy unless treated in some way.
I have made the new raised-beds with 2 1/2 " round stakes, using patio-decking for one and half-round fence pieces for the other two. The stakes go a couple of feet higher so that I can put netting over where necessary. This should make things a lot easier. With just one more to do I should be ready to go in the spring and, hopefully, grow a lot more this year than ever before.
I used to plant seeds indoors very early before, some times in January-February; but I have found that no matter how early these are planted out in regard to salad crops, there is really only one good crop each year. Last year, to extend this I put seeds into a small container together, rather than in separate 'pugs'. This way They do not grow quite so quick and they can be thinned out and replace those that are used. Also, planting out potatoes and onions early is not always productive since the ground needs to warm up before they grow anyway. I usually do this in early April now which was fine last year. This is in Southern England and northerly areas would have to be later.
I shall start sowing seeds in early March this year and chitting potatoes at the same time. Last year I sowed onions from seed and with the early good and hot weather these were actually fine by around late August, not so long after the seed-onions in fact. A bit smaller, of course, but they were still fine.
I will keep you up to date on the progress this year and supply photos of the garden and allotments.