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Iris pumila

Iris pumila

March is, of course, an exciting and busy gardening time. Seedlings under the grow lights are getting larger and taking on a more adult appearance. Outdoors, the irises and many other perennials are sending up new growth. In a sheltered bed by the house, daffodils followed the reticulata irises into bloom. In the open garden, it is crocus time, and the first Iris pumila opened on March 22.

I cleaned up the pond and restarted the pump. Dianthus seedlings I had started last summer and overwintered indoors were hardened off and transplanted into the garden.

Iris paradoxa seedlings

Iris paradoxa seedlings

Nine seedlings of the exotic oncocyclus species Iris paradoxa, now one year old but small because I neglected to transplant them last year, now have a new home in a planter.









One-year-old hardy cactus seedlings have been moved from the plastic seedling inserts into a tray that will be kept outdoors on the deck until next spring, when they should be ready to plant out. The planting medium is a mixture of commercial cactus mix, sand, and garden soil.











The main activities in March are resuming watering and clearing away last year’s dead foliage and pulling up the cool-season weeds.

On the last day of the month, I planted the blue grama grass (Bouteloua gracilis) in the “restoration” area in the back yard. I scattered some native blue flax (Linum perenne lewisii) and California poppies (Eschscholzia californica) in along with the grass seed for good measure.

blue grama grass seed

blue grama grass seed


watering in the grass and wildflower seeds

rets2013February has given us almost “normal” weather this year – consistently cold (although never extreme), and a bit of precipitation (although not as much as we could use). The first of the spring bulbs (Iris danfordiae and other reticulata irises) are coming into bloom now, a few weeks later than in previous years. Outdoors, I’ve prepared the area for the blue grama grass restoration, and burned some weeds and clutter from last year to clean out some areas.

coldframe2013I’m trying something new with the hardy perennial seeds I received from the NARGS seed exchange or purchased locally at Plants of the Southwest. These enjoy a period of cold treatment to stimulate them to germinate in the spring, so I’ve planted them in plastic inserts and set them in an open, unheated cold frame outside. Curious to see if this treatment suits them.

sdlgs_lightsIndoors, seedlings of vegetables, herbs, flowers, succulents and hardy cacti are thriving under the grow lights. A few of the cactus and succulents have not germinated. Perhaps they are waiting for warmer nights?

I’ve noticed just this week that the one- and three-year-old cacti that I’m growing inside are starting their spring growth spurt, getting a little plumper and greener. I’ll resume watering them weekly now.

My new Meyer lemon tree was attacked by gray aphids. A vigorous hosing off outside seems to have addressed the problem, at least for the time being.

Winter is a good time to enjoy some garden reading. I’ve been on an iris history binge this month, working through the American Iris Society bulletins from the 1920s, which are available on line to e-members. I’ve also had the good fortune to acquire a complete set of publications of the Dwarf Iris Society, and have been reading Walter Welch’s DIS portfolios from the 1950s.

I’m mostly an outdoor gardener. I have a few houseplants (nothing special, the kind you can get at the grocery store) around the house, and I have grow-lights for starting vegetable and flower seeds in the spring. I recently bought a varied assortment of succulents, including a few cacti, for dish gardens in my office at work to replace plants that died when the heating system failed. They will better reflect my current gardening interests than the old spider plant, schefflera, and pelargonium did.

But today I want to share an indoor gardening activity that has turned out to be very fun and to hold my interest better than the generic houseplants: raising cacti and succulents from seed. This is something I’ve done various times over the years. Many people who are not avid gardeners find even the concept of growing cacti from seed startling and even bewildering. We just don’t think of them in that context.

I couple years ago, I ordered a packet of mixed cactus seed from Park Seed, described as a hardy blend. They germinated easily, and although I lost of few over the first few months, I ended up with a happy little assortment:

cactus seedlings

As you can see, they are all different and interesting. They are almost two years old now, and they enjoy life on the window sill, potted in cactus mix, where I water them once a week. Once they have grown to a suitable size, I will plant them out in the outdoor cactus garden by the driveway. I’m guessing that will be a couple more years, at least. This is not an activity for the impatient, but in the meantime they are fun to look at and make nice conversation pieces.

Last year, I ordered some iris seeds from in Germany (they have since relocated to the Canary Islands). As a gift, they sent me a packet of seeds of Aeonium hierrense. This tender succulent is a native of the island of El Hierro, and the description on their website says it can eventually grow to be 1 meter across! The packet supposedly contained 50 seeds (they appeared as a fine powder, the individual seeds too small to be seen). They sprouted readily, and I soon had well over 100 (probably more like 200-300) plants! I transplanted about 40 of them, a few to individual pots and the rest to 9-cell plastic inserts:

Aeonium hierrense seedlings

I’m fascinated by the variation the seedlings are showing in leaf color and markings, as well as size. If these do indeed grow to be a meter across, they will be very impressive houseplants indeed! And it seems I have plenty to share with friends.

Although the seeds available from general gardening sources are very limited in variety, there are hundreds of interesting offerings available from specialist growers and from the seed exchanges of groups like the Cactus and Succulent Society of America. For serious hobbyists, such sources can form the basis of an extensive collection of rare and seldom-seen plants, each carefully identified as to botanical name and place of origin. As a nonspecialist, I’m often just as happy with a mix of seeds from different species. The lack of information and precision is made up for by the simple fun of not knowing exactly what you’ll get and watching each seedling develop into its adult form.

Today, I came across and am tempted to put together an order: several hardy cactus species for the outdoor cactus garden, and some mixed seed of different succulent genera (lithops, echeveria, aeonium, etc.) just for fun.

For the nonspecialist, it is certainly simple to just go the local garden center and pick out cactus and succulent plants that have colors and forms that appeal to you. Nevertheless, one doesn’t have to be a serious collector to enjoy raising them from seed. The process provides a whole different level of connection with the life cycle of these fascinating plants. There is a special kind of reward in patiently watching as the seedlings grow into mature plants that just can’t be replicated by buying plants that have been grown commercially in a nursery.

Update, January 28: I did order some more cactus and succulent seeds to start inside. Here are some of the seedlings, three weeks after planting!

Aeonium seedlings

a mix of Aeonium species

Escobaria vivipara seedlings

Escobaria vivipara

Echinocereus seedlings

Two species of Echinocereus

Lithops seedlings

A mix of Lithops species