We're getting rid of a long line of leylandii trees that are an eye sore, and replacing them with assorted shrubs.

We're got out first 'cleared' area, but we still have to deal with the stumps. Because we're replanting, I don't want anything chemical if it will harm the new plants. However, I need to be able to get rid of them eventually..... I assume.

What's my best option?
a) chemical stump remover that won't hurt the new plants planted in between the stumps? If so, what chemical?
b) stump grinder? Do they have a max diameter?
c) plant between the stumps and just leave them to die naturally? Will the stumps die or will they throw off new shoots?

Additional suggestions welcome, especially from those who'd had to do this in the past

Trees as described will never regrow, they will rot in 10 years time , go ahead and plant between them, save your money and don't bother with a stump grinder.

Did mine a year ago - cut the trees as close to ground level as possible - drill several holes into the top of the stump and allow rain and water into the holes - just leave them - they will go rotten very quickly and just break up when you tap them or stand on them.

Don't try to speed up the process - you may end up with 'HEAVE' as the roots contract - especially important if near to main house of fence posts

ADDED: Contrary to below answers - I have taken out 20 of these trees as described above and none have ever regrown - one year and the stumps were gone thru natural rotting - just keeps them wet by filling the holes you drill into the tops

Your best option would be a stump grinder (no maximum diameter) as leaving them naturally means they will just regrow. Chemicals will take years.Another option is to dig down, cut the roots from the trunk and pull the stumps with a stump puller,bearing in mind you will need something very firm to attach the puller to.You can use the other stumps for this purpose, but the last stump may be a problem.
You can then dispose of them at your local refuse disposal point,or your local Council will collect them,but there may be a small charge.

We've had a professional remove stumps with a grinder. Well worth the money. It does a great job. You'll have sawdust left over but that isn't as difficult to get rid of as the stump later on, or just spread it out and let it become organic matter on its own. It takes a LONG time for stumps to die naturally.

Stump grinders dont have a max dia,but getting roots out is a little difficult.Have you considered hiring a trifor winch and pulling the stumps out.

Stump grinders dont have a max dia,but getting roots out is a little difficult.Have you considered hiring a trifor winch and pulling the stumps out.