Howdy All,
I'd like to fertilize my property this early March but I'm concerned that our chickens may/will eat the granules, and suffer problems.
What's the consensus on fertilizers and chickens? We do let them free-range for 2-4 hours each day.
TWG
In the main, chickens will peck at granualized fertilizer because they explore the world with their beaks, and maybe eat some (not enough to be dangerous), then avoid it. Not good eats. Watering it in afterwards canb help mitigate (rains, sprinklers) but likely counteracts most "weed control" measures in those products. Typically, they want to be applied to damp grass whererain isn't expected for some time
Spray fertilizers don't have that disadvantage, but end up on everything, so the chickens can't avoid it...
The root question is what are you fertilizing, and why? A general purpose fertilizer (10-10-10 or 13-13-13) suggests that you are fertilizing lawn grass because its expected of you, not because you know what your soil actually needs, or doesn't. If your local extension office is open, take some soil samples down, get it tested. Know what you have planted where its going, so you can then determine what's actually needed - which might be garden lime and not nitrogen, phosporous, or potassium at all.
Chicken droppings themselves are pretty good fertilizer (but high nitrogen - the more protein in their feed, the higher the nitrogen) so they can burn some plants. Better to compost them and/or make compost tea from them.
If you need to general purpose fertilize, and a soil sample is impractical, and you don't know specific needs for your grass (or you have a polyculture as I do), then use a lower concentration fertilizer, more frequently - like an 8-8-8. Better still would be to understand what your plants need, so you can plan accordingly - acid/base soil, drainage/aeration/water retention, blooms, leaf/stem, or roots. Each problem has a different solution.
Forgot to mention - "Bonus S" if I recall is for killing dollar weed, dandilion, flax, chickeed, oxalis, and clover among others - all things chickens can (and should) eat. Also
atrazine, which should not be used around watersources (rivers, lakes, streams, ponds, etc) or in their watersheds.