Hi David, thank you for your reply. Maxsea is a seaweed based fertiliser. As you say I'll just do it and see what happens, but I was just curious about how other people store it.
As to your final point, my enthusiasm to fertilise them is based on my results from using fertiliser. Whilst you are right that they might not need it, I don't think that necessarily means we can't (or shouldn't) provide our plants with a supplementary source of nutrition/trace elements.
Personally, I've found that over the past 14 months or so, the plants that receive Maxsea have grown more vigorously than before I started to feed them (and fortunately without any issues).
Maybe that's because I wasn't providing them with the optimal growing conditions prior to using it, but either way its working for me.