2022/23 - Seeds & Stuff I've ordered/bought/acquired

Controlled release granules have two main types. One is controlled by moisture availability (which can be problematical if we have showery weather as all the nutrients are leached out in one go!)

The other type is temeperature controlled. If you imagine tiny golf balls filled with fertiliser which leach out from the 'dimples' as the temperature rises but if it's too cold retains the nurients as it contracts.
In my opinion the second type is better and can control release of fertiliser for up to 6 months!

My white onions that I was so impressed with last year have arrived so will be planted along with the yellow and red onions when I prepare the beds for them.

Thanks Vinny, which brand  controlled release ferti do you go for?

I really shouldn' ttell you this but before I retired I was Head Groundsman at a University. As such I had a sizeable budget and ordered tonnes and tonnes of  fertiliser and grass seed mainly for football and rugby pitches. I was getting sick of the short term gain from conventional fetiliser and the constant need to get manpower to spread it. After much experimentation I finally narowed it it down to a twice yearly application of temperature controlled release fertiliser (Spring & Summer with Autumn & winter spread later in the season) The Summer fert was higher in Nitrogen than the Winter stuff and each gave a constant feed for six months.
When I left the Uni, I didn't realise I had a bag of Autumn fertiliser left in the back of the car and this single bag has sustined me at the allotment ever since!  Its so long ago I honestly can't remember which brand it was,but it was suppied in 20Kg bags only.