How many years does it take for them to bloom?
How long is their blooming period?
How much maintenance do they take?
It might be more beneficial to plant some type of clover or other ground cover as far as nectar flow benefits go?

 

Are they a thorn less cultivar? Despise feral pear and these look far worse!

 

What you have pictured is indeed, a honey locust. They are not very good nectar producers, but they make excellent firewood if you are willing to trim those thorns.
We have a lot of those growing on our place. I thought I would prune some of the lower limbs to encourage bigger stem growth, they responded just like the one in your photo. Never again.
Black Locust is the better nectar producer and can be distinguished by only two thorns at the point where a leaflet emerges from a limb.

Alex

 

I think Black Locust gives more nectar.

 

they are not thornless. I usually plant crimson clover

 

My observation on black locust, after planting a bunch and then a conversation with a fellow beekeeper:

Honey bees have a hard time working them. They have to force the flower petal open to get at the nectar. Bumble bees have an easy time of it, since their weight helps to open the petals to expose the nectary. So even though my trees are buzzing when they bloom, the ratio is more bumble than honey bee. (I suppose that means there's other easier sources of nectar for them at the same time.)

"When they bloom" is also a consideration. My locusts are not reliable bloomers year to year.

 

They are of the devil

Thorns will penetrate tires, boots,skin,etc

kill them all

bill

 

I may give them back to the guy that started them. How is osage orange for nectar? Its thorny, he started one of those too

 

I’d look for something that blooms at a young age in the dearth and that’s also very pretty! He’s probably not growing Sevon-Son Flower or Crape Myrtle?

 

Bees don't work crape myrtle down here. Only time i had bees in mine i had lost a swarm. What is sevon son? I did get a button bush from him, planting it.

 

They gather light yellow pollen from Crapes here. Seven-Son (heptacodium miconioides) is very similar in structure, blooming here in September. It’s a small tree.