Drosera oblanceolata - 10 seeds
Drosera oblanceolata - 10 seeds
Drosera oblanceolata originates from the subtropical climate of Sunset Peak in Hong Kong. It can develop stunning red coloration when given enough light. This striking sundew is becoming a bit more common in cultivation in recent times, but is still fairly difficult to obtain. When provided higher humidity, D. oblanceolata is among the easiest sundews to grow (on the tray method, at least). However, it can not tolerate warmer temperatures very well, unless additional humidity is supplied.
Media: 1 peat: 1 sand is the mix my plants are growing in at the moment. Living sphagnum or good-quality dead sphagnum has worked very nicely as well in the past. Not picky. See habitat info below for a picture of the native soil D. oblanceolata can be found growing in. Media moisture: Drosera oblanceolata seems to do best in moist to very moist/damp soils. It can grow well in a bit drier soils if temperatures are cooler. Pot height: grows well in 3-4 inch pots or even a bit smaller when younger. Larger pots (6-8 inches tall) don’t seem to increase the plant’s size much, if at all. Humidity: in hot temperatures of 800+F (270C+) (indoors on the tray method), Drosera oblanceolata prefers higher humidity (50%-60%+). Otherwise, the plant tends to produce leaves without dew or tentacles (see picture below). Based on the results from another grower and personal experience, this species appreciates higher humidity at any temperature (but it is not required in cooler temperatures).
The first thing you should always do is rinse the media you plan to use (i.e. sphagnum peat and silica sand or long-fibered sphagnum). Then, prepare and mix the media you will be using (i.e. 1 part peat to 1 part sand) after following the instructions shown on my sundew cultivation page. Then place the media in the desired pot you want to use. Any pot over 2-inches tall will be fine, but I usually use pots that are 4-inches tall so I don't have to transplant the sundews for a while. Taller pots also allow sundews to grow larger and can help to prevent root sensitivity to water with the more picky Drosera species. 1. Preparing your pots- Pack down the desired media as much as possible- especially at the bottom of the pot. This will keep the soil from drying out at the surface. It also allows you to use a bit less water in the tray, which can reduce algae and insect breakouts. I've had good success packing down the top of the media as well, but this is not necessary. Make sure to thoroughly rinse the soil mixture first to avoid mold and algae growth. You can use very small containers if you want to transplant the seedlings after they germinate, or you can use a larger 3+ pots if you want to avoid having to transplant them. 2. Sowing your sundew seeds- Sprinkle the seeds on the surface of the soil. I usually gently press my index finger onto some seeds. The seeds will normally stick unless your hand is very dry. Slowly bring your hand over the soil of a pot you've prepared. Then rub your thumb and index finger together, so that some of the seeds fall off of your finger onto the surface of the media. Try to spread the seeds around the entire surface of the pot, avoiding clumping a bunch together. This can sometimes be hard to judge, since the sundew seeds are so tiny. DO NOT BURY THE SEEDS, OR NOTHING WILL GROW! If the seeds are spread out a good distance apart (around a centimeter or further), they will be able to grow larger than if the seeds are clumped. You an also gently separate the seedlings with tweezers if you find that you accidentally clumped them together. If you are planting multiple species in different pots, be sure to get all the seeds off of your fingers before sowing the next species. This can lead to mislabeling and confusion. 3. Final steps- Now you're ready to put the seeded pots in the germination set-up you prepared earlier. Higher humidity seems to aid germination success. To provide a humidity boost, I place my pots in a sterilite container with saran wrap on the top to seal in humidity. You will then want to provide a warm, humid environment for the seeds in order to get the highest germination rates. See the next paragraph or more information about the proper temperature range. Temperature Range for Germination Subtropical and tropical sundew seeds have the highest rates of germination when provided with a warm, humid environment. Since it gets pretty cold in my room during the winter, I place a small heat mat partly underneath the sterilite container during the times of the year that temperatures are lower than 75 degrees F in my house. I turn the heat mat on in the day and shut it off at night (it is synchronized with my lights). This creates a perfect balmy environment of 75-80 degrees F in the day for germinating subtropical sundew seeds. The ICPS guide says that 80 degrees is perfect. I've also found the nighttime drop, even as low as 58 degrees F is actually beneficial and seems to aid in germination success. For tropical Drosera, I place the entire mat under the germination container, since these species will do best in temperatures of 85-90+ degrees F. Once your seeds have germinated... It can take from less than a week over 2+ months for sundew seeds to germinate, primarily depending on how fresh the seed is (but germination conditions can also affect the speed of germination). Some Drosera species will take much longer to germinate than others. Tuberous species are noted for taking the longest time, sometimes requiring over 3 years of a consistent seasonal cycle until they will germinate!