When conditions are warm your sprouts will likely grow faster. If their leaves open sooner you should green and de-hull and harvest sooner. Likewise they may grow slower if conditions are very cool. These are just tiny plants - they are not difficult to understand. The more you sprout the better you'll know them and be able to adjust to their needs. As always 70° is optimal and 70° is what our instructions are written for.
All sprouts generate heat while growing, which is a good thing, but it can get out of hand on occasion. When the weather is especially hot and humid you will do well to Rinse more frequently (every 8 hours if possible) using colder water than usual (the coldest your tap can offer is fine), to compensate.
Depending on your sprouting device, not all of your sprouts will have access to light and so some will not green. This is not only OK - it is good. The yellow sprouts will be equally nutritious (they have everything but chlorophyll) and many think them more delicious (in Europe vegetables are often grown "blanched" by avoiding light). We think they are prettier when there is a mix of green and yellow to go with the white roots. So don't sweat it - just eat more sprouts!
WE'RE NEVER TOO OLD TO LEARN
For over 20 years I (Gil) have been saying something I disproved in July 0f 2019. Here it is...
It is ESSENTIAL that you keep Brassica sprouts from clumping together and you cannot grow them vertically using a tray sprouter. Brassica sprouts will mat together forming a dense bluish root mass which not only is unattractive but shortens the shelf life of the finished sprouts. So mix ‘em up! We use high water pressure when Rinsing to keep our brassica sprouts loose, but this only works for so long - so - when water isn't enough, break the clump of sprouts up using a fork or your fingers (wash your hands first please, if they need it). If you are using a sprouter that can hold water, fill it mostly full then use a fork to loosen. You can also dump your sprouts onto or into something and just shake them apart. You should never be afraid** of touching your sprouts. They are much stronger then they appear - just be reasonably gentle.
So, that's not all wrong - in fact it is right in every case but one (though I will be re-testing every Sprouter to be sure). You CAN grow Brassica Sprouts vertically - using our Stainless Steel Sprouter. I believe that it has to do with growing in a round tray - - I've seen other cases where crops grow differently in our SSSprouter. Besides this wonderful growing method - the crop grows more efficiently. The yields I've gotten have been over 50% higher!
For me, the biggest deal about disproving my rule is that I find I have been saying something to you that just isn't 100% true. All over the site I warn you to beware of dogma. That I now find myself to have been dogmatic - and wrong too - - well - - I have to question myself. We're never too old to learn @:~}
** The only thing to fear is fear itself.
Broccoli awaits Soaking.
12 hours later.... Harvest Time!
Another view of just how much Broccoli sprouts grow.
Cultivar: Green Sprouting Calabrese