Questions tagged [roots]

Plant organ that is typically below ground. Use this tag with questions about roots in general. How to prune, diagnose issues, encourage better root growth, etc..

Vascular plants have roots. These are an organ of the plant that lacks leaves (and nodes) that absorbs water and nutrients (typically from the soil), and anchor the plant to the soil (or host/ledge for an epiphyte). There are plenty of exceptions. For example a rhizome is actually a piece of buried stem. Similarly, roots can be aerial - especially in water logged conditions, and with epiphytes.

As well as being an essential part of most vascular plants, roots play an important role in the landscape, as they help prevent soil erosion.

There are a wide range of different root types found on various plants. For example a 'tap root' goes very deep to tap water in drought / low water table conditions. A 'stilt root' comes out of the plant's trunk a few feet up, providing support for the plant, and even allow very limited lateral movement of the plant. A tuberous root stores food or water - eg. a sweet potato.

Although barely visible, plant root systems can be very large, and as a general rule-of-thumb, typically mirror the extends of the above-ground foliage.

Use this tag for all questions about roots. For example, protecting them, pruning them, removing them, etc.

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When rooting cuttings in water, should the water be exchanged regularly?

When my mom roots cuttings in water, she always insist that the water in the glass / jam jar / other container should not be exchanged, only topped up as needed. She even will place newer cuttings in the jars with older (by days or weeks) cuttings…
Stephie
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Are these growths on my houseplant roots?

I'm not sure of the name of this plant. It doesn't grow too quickly, maybe one or two inches each year. Is the growth in the bottom picture a root? Can I clone this plant from that? (Click on the pictures to see closer views.)
Jason Delaney
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Can Tree Roots Regrow

I tilled an area about 3 feet from a large Crape Myrtle (all the way around), about 6 inches down. I did indeed get a lot of small roots (like pencil thick) and a couple large ones (about wrist thick) that I had to chop and remove. Will some of…
scott.schaffer
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What should I do about old invasive redwood roots after the trees are cut down?

Our redwood trees were too big and too close to the house so we had them cut down. Now we will grind out the stumps and remove the large roots. However, the ground is totally saturated with the smaller old redwood roots. What should we do about…
Lorrie
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Are the roots of cherry trees dangerous to house foundations?

We have a fruiting cherry tree which is 18 months old. It's planted quite close to the house. Are the roots dangerous to the property?
Joy Bullock
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What is this white mold growing in my germinating avocado roots?

It forms white textured bumps near the top of the root, underwater: This also happened to a previous avocado seed I started, and when the plant died after about 12 months, I dug up the roots, and these textured bumps were still visible (but brown…
Animik
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The age of an Opuntia (prickly pear cactus)

Opuntia, prickly pear cactus, is a hardy plant with a wide range of distribution. Its growth habit is by branching paddles, or nopales. Is there any way to measure or estimate the age of such a cactus? By age, I think I mean the time elapsed since…
Aaron Brick
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Do soil nutrients travel to the surface?

I've built four additional raised beds for my garden, and put a lot of tree branches and cow manure at the bottom. The problem is, the beds are two feet deep (24" sides, I mean), and I had intended on filling them to within 4 inches of the top with…
Jamin Grey
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Why is it bad to till wet soil?

I read that tilling wet soil can destroy soil structure and make it more difficult for seeds to grow roots through the soil. How exactly do roots find their way through the soil? Can artificial soil structure be created for roots to grow more…
zavtra
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How should I deal with tree root pushing on brick retaining wall?

We have a Mt Fuji, Prunus 'Shirotae', tree with a total diameter of about 8 meters (26 feet). We only have a small garden but love this tree. It's planted next to a brick retaining wall (goes down to our driveway). For a long time it's been fine but…
ioquatix
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Saving sun-scorched succulents

I recently moved several small potted succulents from partial shade to full sun, which proved catastrophic for many of them. Specific genera among the casualties: Echeveria / Graptopetalum Faucaria Sedum Sempervivum Can these plants regrow from…
augurar
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Growing Epipremnum aureum stem roots on potted plant

I have an Epipremnum aureum (once rooted from a cutting) in a soil pot. It took some time, but then it grew at an incredible rate, with a thick stem (fingerbreadth) and large leaves. On the other side, where it’s stuck in the soil, it’s decreasing…
dakab
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Why does the tree trunk grow in diameter?

Why does the tree trunk grow in diameter even though you cut the roots and tips of branches?
Rain
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Why should I prune roots of bare root blackberries before planting?

I bought some bare root blackberries from a reputable nursery and in the instructions they said to "prune roots 1/2" to 1" with sharp pruning shears" before planting. What purpose does this serve?
Philip
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What are the practical differences between cucurbits grown from seed and cuttings?

What are the practical differences between cucumbers grown from seed and cucumbers of the same maturity level and equivalent root maturity from cuttings? Is there a significant difference between yield and fruit size/quality of cucumbers grown from…
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