I usually use natural products to feetilize the garden but about once a year I'll use a bought store mix like 10 10 10 ..12 12 12 pr 19 19 19.

My question is how do I keep the fertizer from becoming wet. Within a day of opening the bag the feetilizeris wet and clumpy.

It's stored I a dry area.

Why is this happeneing?

Its hydroscopic. Except for the effort involved to bust up the clumps it is still good

Nitrogen naturally attracts water. Bags of 15-15-15 etc.. come in plastic because of this. I just put a zip tie real tight after twisting the bag corner up that I cut to dump out fertilizer. If using a small amount an old coffee can with a lid will suffice or a 5 gallon bucket with a tight fitting lid

what is the air humidity in WV

guessing so thick you could cut it with a knife many days and mornings

air tight container would probably be the best you can do short of keeping it in a hot box to cook the moisture out like is done with welding rods

Gama lids on 5 gallon pails might do it

vacuum packing it might be even better just put the bag in and suck all the air out https://www.homedepot.com/p/Woolite-1PC-CUBE-JUMBO-VACUUM-STORAGE-BAG-35-43-15-5-W-85564/305235218

or buy what you need to spread and spread it all right away

5 gallon buckets with good seals and lids is your answer

It sounds like a homogeneous product. Try a sulfur or poly coated product. Could spread entire bag when first opened .

I'm still using it I don't know why is al.i knew it was drawing moisture but no idea why.

Thanks everyone who answered.

Fertilizer is like ethanol gas it sucks moisture.

Move to the desert

I'll make do with soggy fertilizer first.

I used to store all my glands and lures in a Coleman cooler and it would always gather enough moisture to make a mess. I am in the desert.

No Danny, its not. Hygroscopic is what it is. Google it. I know its counter intuitive since the issue is water, but that's the correct word for something that absorbs water directly from the air.

Put your opened fertilizer bag in a plastic garbage bag, twist the neck, double it over and twist tie or tape. A good lid on a 5 gal bucket usually works to.