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Jun 7, 2017 7:15 AM CST
|We got this from a neighboring office and it's pretty but it's been losing leaves gradually and I'm worried.
I've been watering about a quart once a week. It often has some water hanging around in the tray for days afterward. Does that mean I'm overwatering? I thought brown tips on the leaves meant underwatering so I'm confused.
Also curious what kind of plant it is.
Jun 7, 2017 7:24 AM CST
Yes, that sounds like too much water. Gene
Jun 7, 2017 8:42 AM CST
|Whenever water is in a drip tray, it can cause roots to rot if the roots are in contact with it.
It looks like Philodendron bipinnatifidum.
Tree Philodendron (Philodendron bipinnatifidum)
Not a plant that will tolerate dry soil, so if keeping the soil moist is causing problems with the roots rotting, it is because the soil has no air in it when it is moist, either because it is comprised of very small particles, has been smashed down into the pot, has filled with roots, or some combo of these factors. Brown tips are a sign the roots are unhappy.
What is necessary for plants to stay alive is for their roots to not rot, which can happen so easily in a pot with dense soils, like ground dirt, or bagged mixes of predominantly tiny particles of peat, (or to simply shrivel from simply never getting any water.) Having very little soil around the roots would make the soil dry more quickly, and for even the most dedicated plant-overwaterers to not rot the roots of their plants. This is not ideal, since most non-cactus plants are stressed by dry conditions, it's just a way of coping with soil that has little air in it when moist.
Negative experiences in regard to potting-up, where an undisturbed root ball is placed into a bigger pot with more soil around it, vs. doing a repotting, as described below, can give rise to old wives' tales about plants not liking to be repotted/disturbed. Potting-up a root-bound plant that has roots surrounding the outside root ball often lead to this negative experience because those roots had adapted to accessing oxygen around the outside of the root ball and surrounding them with more dense, soggy-but-airless potting soil will likely lead to suffocation.
The reason bonsai masters are able to keep potted entities alive for hundreds of years is because they care for the roots by trimming them and changing the soil. A plant grows from the roots-up, so if the roots are not healthy, gorgeous foliage will decline &/or no flowers can form. When you unpot a plant and find a pancake of roots at the bottom, chopping that off will give roots a chance to grow normally again for a while and will make removing the old soil easier.
Roots need oxygen & moisture at the same time to function. Just air = shriveling. Just moisture = suffocation & rotting. Either will cause root death and dessicated foliage because the roots have been unable to deliver moisture. Having to let soil dry, as if ones' tropical jungle plant was a cactus, is an unnecessarily stressful coping mechanism for non-desert dwelling plants in soil without enough oxygen for the roots to stay healthy when it is moist and can lead to premature loss of older leaves and in extreme cases, dry shriveled roots/dead plant.
The ability of roots to be able to function properly depends greatly on the soil structure/texture, which can change over time. Potting soil tends to be very dense, mostly peat, with very little air in it. Any kind of organic ingredients decompose into smaller bits over time, and roots fill air spaces over time as they grow through soil. Replacing soil periodically is usually necessary to keep plants healthy because of these reasons. A more porous, chunky, airy soil (like cactus/palm, if one is buying bagged,) can have more air in it even when it is moist because there is space between the particles. When there are tiny particles of any kind in a pot, such as peat, sand, silt, clay, they filter into all of the tiny spaces in a pot, eliminating the air. "Overwatering" is the label and manifestation when roots have suffocated and/or rotted, combo of both. Over time, organic bits decompose into smaller bits, so even the "best" soil, if it has organic components, will need to be replaced when this happens. The speed at which this happens depends on many variables, but on average, about 1-3 years.
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Name: Will Creed
Professional indoor plant consultan
Jun 10, 2017 9:10 AM CST
|Let's keep it simple. Brown leaf tipping can be caused by inadequate light (not likely in this instance), under or over watering. This is an older plant that does not use as much water as it did and you can allow the soil to dry down a bit more than usual. In this case, I suggest allowing the top half-inch or so of soil to become dry before adding any water. Add just enough water so that it reaches that level of dryness again in about a week. Adjust the amount of water you provide accordingly.
The existing spots will not go away. Look for a reduction in lower leaf loss and the emergence of healthy new growth as indicators that you are on the right track.
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Jun 10, 2017 9:41 AM CST
|To my eyes, the plant in question looks more like Philodendron xanadu, there are lots of photos in the database: Philodendron xanadu Here are a couple for comparison:
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