Key takeaways
- Root sprouting is aspen's most common way to regenerate, and saplings may start producing root sprouts at one year of age.
- Aspen stands are clones connected by a shared parent root system, so the shoots may come from a root far from the stump.
- Stump grinding removes the stump but not the spreading roots, so it does not stop suckers.
- Plan for the next several seasons, and ask the arborist whether this tree should come out at all.
Homeowners who take out an aspen are often surprised when a thicket appears across the lawn the next summer. The tree has not failed to die. It is behaving the way aspen do.
Why does aspen send up suckers?
The Forest Service's Fire Effects Information System says quaking aspen regenerates from seed and by sprouting from the roots, and that root sprouting is the most common method. Root suckers originate from buds in the root and can develop at any time during secondary growth. The same source says there are thousands of suppressed shoot buds on the roots of most mature aspen clones.
Cutting the tree is a signal for those buds to wake up. Stump and root crown sprouting is rare in older trees, so most of the new growth comes up from the roots, sometimes far from where the trunk stood.
How far do the roots go?
The Forest Service says aspen has a relatively shallow root system with wide-spreading lateral roots, and that laterals may extend over 100 feet into open areas. Aspen forms clones connected by a common parent root system, so a grove can be one connected organism. In a Utah and Wyoming study cited by the source, a quarter of sprouts came from roots within 1.6 inches of the surface and 70 percent from within 3.2 inches.
Shallow roots mean shoots show up in lawns, beds and cracks in paving. They also mean digging for roots near the surface damages neighbors' plants. See our quaking aspen species page.
What are the options?
The honest first question is whether the aspen has to come out at all. A tree with a dead top, trunk cankers or heavy lean may need to go. A healthy aspen that is simply inconvenient may be better managed. If you do remove it, plan for years of shoots.
We take aspen down and grind the stump. We do not spray or inject, which is not part of our service. Mowing or cutting shoots as they appear is what many owners do, and it is a repeating task. An arborist can talk through options for your lot. See tree removal and stump grinding.
Does stump grinding stop suckers?
No. Grinding removes the stump and the top of the root crown, but not the lateral roots that carry the dormant buds. Since the Forest Service says root sprouts are the main way aspen regenerates, new shoots can come from roots that were never touched. Read stump grinding versus full stump removal and the question page will a ground stump sprout?
What about pruning and timing?
The Forest Service says aboveground stems in the West may live up to 150 years, while the clone can be much older. For pruning timing, see when to prune aspen. Call 775.232.8243 for a free estimate and a certified arborist's opinion.
Sources
- USDA Forest Service Fire Effects Information System: Populus tremuloides (quaking aspen) (read October 17, 2026)
- International Society of Arboriculture, Trees Are Good: Mature Tree Care (brochure) (read October 17, 2026)