I think it's royal sunset. A couple of stalks were so heavy this year that the have fallen over with roots at the base. Can I replant them? I've tried using supports and they are so heavy that they drag supports as well.

They have been in the ground 4 years and they have leaned over but never fallen like this.

What to do?

For this season, I would use stronger supports. They will survive replanting, but will protest. They would die back sooner in the summer, flowers will be unsatisfactory (if at all), and bulb growth for next year's display will be curtailed. This fall, I would replant deeper.

Over fertilization can encourage "falling over", as well as the possibility that the mother bulb has rotted and the plant is living on the stem roots only, that provide poor anchoring.

It happens to be an area that got overwatered last fall b/c of sprinkler mishap. It would make sense to me that some rot occurred. Tempted to do nothing as Lily multiplied more than I expected.

At first I was thinking my pooch was stepping on plants but Ive been watching him and he doesn't really go in that area.

As to planting depth. I followed grower's instructions but I'll remember to plant deeper. I had specifically selected "short" lilies to mitigate flop. But it didn't quite work out that way. Oh well.

Thank u for very useful input.

If, when you dig you find that the bulb did rot, then don't plant any deeper.

Once a friend dug a plant of Lilium formosanum pricei. When I planted it, I found she had not actually dug the bulb, but the stalk severed above the bulb and there were lots of stem roots attached. I planted it anyway and the stem and flower bud continued to thrive and bloom. I even got seed, as the plant itself would die anyway.

Just realized I forgot to post pic of plant. It was on the ground and hubs gave it a light tug, hoping to get it to stand. And it just came off. I haven't done any investigative digging yet

Unfortunately I don't have much hope for that, considering how short and limited the stem roots are at the base.

Does it look like the stem has rotted away at the bottom?

There is no rot below ground. Now I'm thinking that the mere weight of a stalk, on a very windy day, could have fallen on its own. I weighed the stalk and it was almost 1.8 pound. Quite heavy! Anyway, here it is, living a better life. And it is not royal sunset. Edited to add: this is Indian Summerset.

So my doggie is innocent. It wasn't him trampling through my lilies, it was the wind. As you can see from this pic, plant fell with roots. Is the bulb still underneath? Will it come up next year?

It looks like the mother bulb did rot. There should be a strong stem all the way from the above ground part of the plant to the bulb. Sometimes when a bulb rots, some of the individual scales of the bulb survive and produce baby plants. Usually, though, everything dies.