As you are aware I am trying to start a Psychology Sunflower Challenge.
About two dozen seeds were started off in damp jiffy pellets, and made quite rapid progress. In my experience, they do grow very quickly, and you do end up potting them up quite rapidly.
The seedling babies were growing quite quickly on the window sill, so did need to be potted up. Otherwise they get leggy, bend, and keel over. Cue emergency pot up. As you can see above, they have placed into small pots and are on their first baby leaves with the true leaves just about to sprout. These are greedy, sun loving creatures. So they do need warmth, light, and for now, water. The compost is full of nutrients for the next six weeks. By which time, it will be necessary to harden them off, having possible put them into bigger pots. They will need to be protected if there is a sharp drop in temperature and a frost.
I have sown two varieties here. These are sunburst, which get to about five tall, and giant sunflowers, which are something even taller and with multiple flowers.
Hopefully these will all continue to thrive and survive. Will hopefully sow a few more and encourage more pollinators on the plot.
If you have sown some sunflowers, then please let me know. Would be lovely to see what is happening ^_^