Green roof visit

This past weekend, we went up to the green  roof for the first time in a few weeks; weather conditions were not favorable until recently. The green roof looked very much like an actual prairie; there were lots of grasses as well as some flowers and other ground cover plants.

Notice the storm clouds in the upper left

Thankfully it didn't rain while we were up there. In late fall or winter (November-January) we will go in and cut back everything and add some fertilizer, and then seed all beds. The native flower mix has worked well in the past, so it will probably be the main mix that we use, in addition to some other flowers.

Carnivorous Plants, revisited

Until this past plant sale (9/18/14), we never sold many carnivorous plants, save for the occasional Venus flytrap. But this time around, I was able to propagate a large number of Nepenthes ventrata (Asian pitcher plant or monkey cups) as well as a few Sarracenia "Cobra's Nest" (North American pitcher plant).

Every single carnivorous plant (CP) I brought for the sale was sold! We will definitely have more for our next sale, and I am working on propagating other species for the spring, such as sundews and Mexican butterworts. In the meantime, I'll take more cuttings of Nepenthes and continue leaf pullings for Venus flytraps.

Nepenthes ventrata for the Oct 22 sale!

Nepenthes ventrata, almost 2 years old

S. "Cobra's Nest"

A VFT with red coloration

Australian sundew

Mexican butterwort

If you have any questions about how to care for your CPs, I would recommend that you take a look at our care sheet (adapted from the care sheet at the Flytrap Store).

Scarifying and germinating seeds

To start the fall semester, I decided to purchase some interesting seeds online - dragon tree seeds. The fully grown tree is known for having blood-red resin in its trunk, which has a variety of uses. There are two main species of dragon trees that are harvested for this resin - Dracaena drago and Dracaena cinnabari. I could only find seeds for the former, which is native to the Canary Islands.

Unlike most seeds, dragon tree seeds have a very tough outer shell. This protects the seeds as they pass through birds' digestive tracts in their natural habitat, allowing them to be dispersed in various locations, but it also makes it more difficult for growers to germinate the seed. To break this coat and allow water into the seed, scarification is key. Scarification involves nicking or breaking the outer coat of seeds to speed up the germination process. Usually sandpaper is used, though knives can also work for larger seeds. I found that sandpaper worked fine for these relatively small seeds (~5mm in diameter). Scarification is also useful for other plants with tough seeds, such as bluebonnets.

Notice the dark orange outer coat and the exposed white surface of the seed

After scarifying all seeds, I placed them in a cup of water for about three days, changing the water periodically. After this time, you can see a single white root protruding from many of the seeds. This seed should be planted in well-draining soil with this root pointing down and covered with 0.25 inches of soil. I just planted mine, so I have no idea how long it takes to germinate when they have the single root, but most sources indicate 30 days for any growth to appear.

Help us Help You!

Today is a wonderful day to buy plants!

But before we do that, The Horticulture Society would like for each and every one of you to fill out a survey to help us cater to your wants and needs. 

We are planning our best year yet, and we cannot do it without your input! Below is the link to the survey and our email address (just in case you would like to give us more points on how to improve our plant sales and other events). 

Email: uhgreenhouse@gmail.com

Survey: https://www.surveymonkey.com/s/RQD8KJ7 

Earth Day Update

We had a blast at this year's UH Earth Day (4/22/14)! Numerous organizations were there, from UH's own Sustainability and Campus Community Garden to the Center for Biological Diversity and Galveston Coastal Prairie Conservation groups. Our organization was fortunate enough to get a nice tent, though it didn't end up raining.

We had a table set up with a board detailing our plants, our volunteer efforts, and most importantly, our work on the green roof. Additionally, we were giving away peat pellets along with herb and vegetable seeds for visitors to take and plant for themselves.

Our webmaster Mel is very excited for Earth Day!

While we ran out of freebies to give away after only an hour, we were still able to reach out to many students and staff who had never heard of us before. Hopefully we'll see them in the fall semester!

New succulents for the fall

I recently went to Home Depot, looking for any new plants that I could add to the greenhouse. Surprisingly, they had a very large variety of succulents offered, many of which were native to South Africa and were never offered there before (to my knowledge). Others were succulents we once had, but the mother plants were sold off or died before propagation.

These are some pretty nifty plants, and hopefully we'll have some for sale this fall; if they aren't big enough by then (I'll be fertilizing throughout summer), you'll be able to buy them in the spring.

Zebra Plant (Haworthia fasciata). Our original died, but now I know how little water this plant needs. 

Firestorm sedum (Sedum aldophii "Firestorm"). It's always nice to add more sedum to our collection, and this one has deep red coloration, very fitting for our university. 

Haworthia venosa v. tessellata. Another cool plant from South Africa. 

Crassula "Caput Minima". It has unusually soft leaves and a tesselated appearance. 

Haworthia subspecies. Very tough leaves. 

Dwarf Ox Tongue (Gasteria liliputana). I'm not sure what ox tongues look like, but this plant looks pretty interesting. Gasteria are pretty closely related to aloe vera, but their leaves can be sturdier. 

Haworthia mirabilis mundula. Another neat Haworthia, with redder coloration. 

Lithops subspecies. Also known as the mimicry plant or living stones because they closely resemble ordinary rocks. In the wild, they receive less than two feet of rainfall a year, so they have long taproots to obtain water from deep underground. 

Plush plant (Echeveria harmsii). Similar to the panda plant with its fuzzy leaves, but its growth is more akin to that of a sedum. 

Two unknown plants from Whole Foods Market (grown in East Texas), most likely Haworthia.

Green Roof Progress

Different flowers bloom at different times on the roof, so we go up every week or so to check on it. Here's how the flora changed over a three week period. 

April 18 - lots of bluebonnets and Indian paintbrush

April 24 - most of the bluebonnets went to seed, and now pink primrose and plains coreopsis dominate. Dr. Medrano from the biology department was also with us. 

May 2 - pink primroses are fading, lemon mint are beginning to bloom

We'll continue monitoring the progress on the roof throughout the summer until all the flowering plants die back, then we'll cut down any tall grasses or flowers so that we can reseed in the fall.