My anecdotal view is that generic listings (of branded items) don't do well when buyers are browsing. That view is however shaped by me being a seller.

Generally i think your listings are on the lower end of quality. I'll use the "war chest chilli kit" as an example. Your main image doesn't have a white background which Amazon do not like and can result in a lower placement in search results.

The title could be improved a lot. There's no clear reason from the title why it is called the war chest or why it is army themed. My assumption was that it would be very hot chillis but looking at one of the images that's not the case. I don't think linking the shape of the chillis to the army is really a selling point - especially given only one of them seems to have much heat.

You only have one bullet point on the listing which doesn't tell a buyer anything at all. Why doesn't it say what the kit includes and more importantly what the 3 carefully selected chillis are?

The product description is just a list of occasions that it might make a good gift for. I'm never a fan of seeing every possible event / occasion being listed like that.

On a very minor note the item model number for the chilli grow kit is "tomato variety number 5".

Edit - for clarity Amazon has things it expects to see in a quality listing. If they deem a listing of low / poor quality they can relegate it in search results.