The knobby growths emerging from the leaf stem bases are the beginnings of aerial roots, a normal development for aroid-family plants like Anthurium. Sometimes they stop developing if the air is too dry (low humidity), though they might continue to grow downwards into the pot.

You might be able to shorten the plant for a while (until it matures enough to grow tall again) by propagating it via cuttings instead of division, though we don't have experience taking such cuttings on this kind of Anthurium. One or more cuts (depending on how many cuttings you wanted) could be made between leaf nodes, and they will need time to root. Maintaining high humidity around cuttings can help them root-out faster and experience less stress and leaf drop while they acclimate.

Otherwise, you can divide the plant if the two growth points do not share a root system; this can be determined by unpotting the plant and removing as much soil as possible to get a clear look at the root structure. Based on what we can see in the photos, we'd guess that's the case here: two plants sharing one pot, which is fairly common. In that event, it would be fairly easy to separate the two so you could pot each plant up separately if that's what you prefer.

We do not know if you can bury the main stem of either piece more deeply in the pot once repotted. For some plant species (like Phalaenopsis orchids), as they grow taller and develop more roots higher-up on the stem, the lowest roots and oldest part of the stem below naturally rot away. In that situation, you can cut off any dead and/or mushy areas at the base of its stem (once out of the pot and removed from soil so you can see it clearly). Then, you can probably pot it back up so the stem sits a bit lower in the soil than it used to, burying a few of those root nubs that will continue to develop into full-size roots, anchoring the plant in the pot more sturdily.

If it's been well over a year or more since the plant was last repotted, it may also help with overall health to have the soil refreshed when you propagate or divide/repot. Remove what old soil you can and replace it with fresh, regardless of whether you change pot sizes or not. Changing out potting mix every now and then helps avoid root stress from retained salts -- minerals in the water or unused fertilizer that build up over time to levels that could interfere with root health.

Miri



You're welcome.