When you see an entirely yellow leaf, you should remove it from your plant using a sterile cutting tool. Removing the leaf will let the plant focus its nutrients on healthy leaves. A yellow leaf has lost its chlorophyll (pigment) and it can't turn green again even after you correct the problem.
'Cutting off the affected leaves will prevent the disease from spreading to the rest of the leaves, however, avoid pruning yellow leaves if the cause is root decay as the healthy monstera leaves can still draw nutrients from the dying leaves. '
Yellow Leaves + Fading to Green + or Bright Yellow =
These symptoms together mean that your plant is overwatered. Usually lower leaves drop first, although the whole plant may be affected. The solution = repot (to remove soaked soil) and water less, or let soil dry out and water less.
A yellow leaf has lost its chlorophyll (pigment) and it can't turn green again even after you correct the problem. Don't worry, if the plant regains its health, it's possible that new leaves will fill in during the next growing season. Growing plants is always a matter of patience.
Over-fertilizing. People often use too much fertilizer to make their plants grow faster. The excess salt in the soil from too much fertilizer “burns” the leaves causing them to turn yellow. In the case of houseplants, change the soil or leach it with large amounts of water to correct the balance.
Prune your monstera
Another way to control growth is by clipping back foliage. Trim leaves at the point about two inches below the node (where the leaf meets the stem) to shape your monstera and promote healthy growth. One option is to turn those clippings into more monsteras.
If your monstera leaves are turning yellow and developing black spots, act fast! Your monstera most likely has root rot, which can quickly kill your plant if you don't nip it in the bud. To treat root rot, repot your monstera into fresh soil and a clean pot.
Plants need light, but too much of a good thing can affect your plant's health and cause leaves to turn yellow. Sunburn may cause dark burn-like spots on leaves or can cause full yellowing of leaves receiving too much sun.
The appearance of yellow leaves on plants can happen for a variety of reasons. Perhaps your trendy green babies received an overabundance of sunlight, not enough sunlight, too much water or fertilizer, or even fell victim to garden pests or one too many cold drafts.
Not Enough Light
Without enough light, plants can't properly photosynthesize. Yellow leaves due to lack of light is a common problem with houseplants because people often grossly underestimate the amount of light a plant is getting. Key indicators: Leaf yellowing, leaf drop, and a leggy appearance.
Determine which by feeling the leaf showing browning: if it feels crispy and light, it is underwatered. If it feels soft and limp, it is overwatered. Yellowing leaves: Usually accompanied by new growth falling, yellow leaves are an indication of overwatering.
4. Nutrient Deficiency. Nitrogen is often the first nutrient that comes to mind as the culprit when leaves turn yellow, but it is not the only one. Yellowing of the leaves can also indicate that the soil is lacking other nutrients such as iron, manganese, or zinc.
To fix a monstera with yellow, drooping leaves, reduce the frequency of watering so that the top inch of soil dries out, ensure the monstera's pot has drainage holes in the base and inspect the roots for root rot, and snip back any diseased roots.
Prune your monstera once a year if you need to control its size. Dead leaves can be removed at any time, says Anna. Monsteras are dormant in winter, and tend to grow rapidly during the warmer months. It's best to do your annual trim just before this growth spurt begins, in spring.
The most common cause of yellowing leaves among Monsteras is improper soil moisture–in particular, overwatering. Only water your Monstera when the top 2-3 inches of soil are dry. Soil should remain damp, but not wet. In the winter, you can allow your plant to dry out a little more between waterings.
Find a node with an axillary bud (refer to the Monstera propagation map). Multiple leaves on your cutting promote better rooting through photosynthesis. Cut 1 to 2 inches below the node, along the internode.
If you give your Monstera deliciosa a lot of light, humidity, and ample warmth, you can get new leaves every couple of weeks. Monsteras that are given more standard care grow much more slowly. Monstera Deliciosa grows pretty quickly in general if you provide them with the right conditions.
Identification. Slow growth and uniform yellowing of older leaves are usually the first symptoms of nitrogen (N) deficiency. Nitrogen-deficient plants produce smaller than normal fruit, leaves, and shoots and these can develop later than normal.
Iron chlorosis is a yellowing of plant leaves often caused by iron deficiency that affects many desirable landscape plants in North America. The primary symptom of iron deficiency is interveinal chlorosis, the development of a yellow leaf with a network of dark green veins.
Epsom Salt for Plants
Aside from the anecdotal evidence about human benefits, Epsom salt does seem to help plants. Generations of gardeners have said it helps their plants grow bushier, produce more flowers and have better color. It's also said to help seeds germinate and repel slugs and other garden pests.