Philodendron seeds do not need to be soaked prior to planting. The seeds will take about 2 to 8 weeks to germinate when the temperature of the soil is kept between 68 and 73 degrees Fahrenheit (20 to 23 degrees Celsius). When the seedlings sprout and become sturdy enough to handle, move each one to a small pot of its own to foster strong root development.
Orchid soil (with bark pieces) and a mixture of sphagnum peat and vermiculite or a mixture of sand and turf/compost can provide good nutrition for your newly planted cutting. [3] X Research source It’s important to keep the cutting watered regularly. Be sure there are drainage holes in the bottom of your pot, so that the cutting is protected from over-watering.
In about 2 weeks, you’ll see roots forming in the moss. You may need to tie the semi-cut branch to a support if it’s unable to support itself. Once you notice a healthy root system growing into the moss, you will be able to sever the stem about 1 inch (2. 5 centimeters) from the air-layering site. Remove the plastic wrap and place the rooted moss ball into a small pot with rich soil. Make sure the pot has good drainage.
If your plant is in a room without sun, you can create artificial light with a mixture of fluorescent and incandescent lighting.
There is a common myth that philodendrons should be watered less in winter, but this is not true. Their native rainforests receive ample rainfall year around, so it’s important to mimic these conditions when you care for the plants. [8] X Research source
The plants are adaptable to temperature fluctuation and can survive in temperatures as low as 55 degrees Fahrenheit (13 degrees Celsius), but they cannot survive frost or freezes. [9] X Research source You can buy temperature and humidity monitors at most garden centers.
You can also place tree branches or moss sticks right in the pot to facilitate climbing.
If your plant is exposed to varied seasonal sunlight, you’ll want to fertilize a little more often in the fall and winter months. This will keep growth steady. As your plant grows bigger, you’ll want to switch to a fertilizer with increasing amounts of nitrogen to support broad, green leaf growth. [10] X Research source
Spider mites, mealy bugs, scale insects, and thrips are pests that can damage your plant. If you notice them, try wiping them away with a mild soap, luke-warm water, and a soft cloth. [11] X Research source
Repotting should be done before the plant experiences new growth. Each plant will be different and growth habits will be dependent on where you live, but it’s usually best to re-pot in late winter or spring. Monitor water levels closely after a re-potting. You don’t want the roots to dry out in the new soil space.
To access the roots for pruning, de-pot the plant and gently remove any clinging soil. The best time to prune roots is when you are moving the plant to a larger pot.
