All posts by Jan Nelson

I am a landscape designer and consultant in the Santa Cruz mountains in California. I write a weekly gardening column for the Press Banner newspaper. I am also a Calif. Advanced Certified Nursery Professional and managed The Plantworks Nursery in Ben Lomond, Ca. for 20 years.
Design trends

Time Well Spent in the Garden

Blooming now are this Lily of the Valley shrub along side the Bleeding Hearts. It’s one of my favorite combinations in the spring garden.

I’m so proud of myself. I write about all the important things to do in the early spring garden but often I don’t get to them myself. Seems there’s that book I’m reading or birding, hiking or wildflower walks that take priority. But this year, I’m on it. I’ve put out Sluggo on the new hosta emerging so the slugs and snails don’t have a field day this year and spread organic fertilizer on all my plants before it rained. I also weeded a little here and there. It’s amazing what you can accomplish in just two hours.

Think of gardening as therapy. Every moment you put in your garden is paid back with fresh vegetables or fragrant flowers. Think about it- stir up the soil, plant some seeds and you have flowers and vegetables in a few months. The satisfaction you get from cultivating living things is priceless. Get started on this free therapy by tending to your garden this week.

  • Check drip systems for leaks or emitters clogged by dirt or earwigs. Flush sediment from filters and check screens for algae. You may need to add emitters if plants have grown significantly and move the emitters farther away from the crown of the plant and out closer to the feeder roots which are under the drip line.
  • Spread fresh compost or wood mulch around all your plants. Good soil is the secret to successful gardening. The first principle of organic gardening is to feed the soil and it will feed the plant. Remember that all gardening used to be organic. Layer 2-3 inches of compost or mulch on top of the soil and let it slowly decompose and filter down into the earth. Bark nuggets do not increase your soil’s fertility like compost or wood chips do but they do conserve moisture and help keep weeds at bay. Transplant any plants in the garden that have outgrown their space or are not with other plants requiring the same water usage Now is a good time because plants are full of growth hormones and recover quickly from transplant shock. As you plant new additions to the garden add organic matter to the soil if it’s sandy. Organic matter enriches and allows it to hold water more efficiently. If your soil is sandy, organic matter will allow your soil to hold more moisture longer. If your soil tends toward clay, organic matter will loosen it and improve drainage. In fertile soil, plants grow deep roots, are hardier for cold, more resistant to disease and more drought tolerant. Organic matter such as compost, planting mix and well-rotted manure boosts nutrition and improves soil structure.
  • Fertilize – Citrus may be looking yellow from lack of nitrogen and iron which is not absorbed easily during the cold season. Shrubs and fruit trees just emerging from dormancy are begging for their first meal of the season. Lawns -if you still have a small section- and ground covers begin their spring growth now also and benefit from a boost of organic nitrogen. Spread a thin layer of compost over everything. Leave grass clippings on the lawn to shade the roots as it get warmer and as they break down they help feed it, too. Perennials benefit from both a fresh layer of compost or composted manure and a light application of balanced fertilizer. They respond to the phosphorus from bone meal especially in the spring for root growth, stem sturdiness and flower development. Wait until azaleas, camellias and rhododendron have finished blooming and you see new leaf growth starting before feeding them.
  • Weed – Pull weeds regularly before they set seed. They pull out easily from moist soil. Weeds rob your plants of precious water. Think of weeding as free gym time. If you are plagued by spiny-ball hedge parsley weeds it’s worth your time to pull them now before they go to seed.
  • Check for aphids. They are out in full force sucking plant juices from the tender new leaves of everything from roses to hellebore to Japanese maples. A strong spray from the hose may be enough to dislodge them. If they still persist, you can spray organic insecticidal soap, neem oil or horticultural oil to kill them. As with all pesticide sprays, do this early in the morning or later when they are not in the sun. Be sure to test first to make sure the spray doesn’t burn the new growth and always mix according to the directions. Ants can also bring aphids up into trees and shrubs such as camellias, citrus and roses. Ants feed off honeydew secreted by aphids, scale and other plant-juice sucking insects. Ants also protect these pests from natural predators. To keep them off, wrap trunks with a 1-2″ wide strip of masking tape and coat with a sticky barrier like Tanglefoot. Keep the barriers free of dirt and check them periodically for breaks. Reapply when necessary

Plant cool season vegetable like peas, chard, spinach, broccoli, cauliflower, cabbage, lettuce, onions and other greens. You can also sow seeds of beets and carrots. The soil is still too cold for tomatoes and other warm season vegetables.

The most important to-do is to take time out and enjoy your garden and our beautiful surroundings. Those last few weeds will be there tomorrow but you’ll never get another today.

Design trends

Celebrate St. Patrick’s Day & Spring Equinox in the Garden this Week

Fatsie japonice aka False Aralia displaying many shades of green.

Everywhere I look, it’s green- forest green, apple green, olive green, fern green, sage green, chartreuse green. Even all those showy flowering trees blooming now will soon be sporting bright green leaves. Since moving to the Santa Cruz Mountains in the late 80’s I have always lived in the forest, first in Felton, then Bonny Doon or now Boulder Creek. The green backdrop of redwoods, oaks and firs make us appreciate all the other colors around us. The calendar says it’s spring and I have “Spring Fever’ like everybody else.

On Tuesday, March 19th at 8:06pm the day and night will be almost equal. That’s why it’s called the Spring Equinox. Some years it falls on March 20th. It would occur on the same day every year if the Earth took exactly 365 days to make a complete revolution around the Sun. But it takes the Earth 365.25 days on average to go around the Sun once. Whatever the exact date and time it’s spring and with St. Patrick’s Day also in a few days I plan to add something green to my garden and tick off a few tasks on my to-do list.

There endless shades of green in nature because color is dependent on light. Humans can see more shades of green than any other color. This is an evolutionary trait handed down from our ancestors who needed to differentiate the shades of green in order to know which plants to eat and which to avoid. Wearing something green on St. Patrick’s Day has been a tradition since emigrants, particularly in the United States, transformed the holiday into a largely secular event celebrating all things Irish. Cities with large numbers of Irish immigrants staged parades going back to 1737 in Boston and in New York City since 1762. Although blue was the color traditionally associated with St. Patrick, green is now commonly connected to this holiday with shamrocks high on the list of things to wear on this day.

I often get a request for green to be in the color palette of plants that go into a garden. There are green flowers that you can grow and of course, many shades of green foliage. The low wavelength of green promotes calm, relaxation and restfulness.

If you’re looking for a heat, drought and deer tolerant plant that attracts birds, butterflies and hummingbirds you should grow Golden Leaf Salvia (salvia officinalis icterina). The fragrant foliage is good to flavor soup, sausage, dressings, cheese dishes and stuffing. The young leaves can even be eaten fresh in salads or cooked in an omelet or with beans, cabbage and garlic.

Another great greenish flowering shrub to try is Safari Goldstrike Conebush. This leucadendron is a vigorous compact grower to 6 feet tall and blooms during the winter and spring. Its bracts are excellent as a cut flower and foliage harvesting. They grow in full sun and have low water needs.

This chartreuse green hosta can take more sun than other varieties and the thick foliage resists slug and snails.

Some of my favorite plants that have green flowers or shades of green foliage are green hydrangeas, green hellebore, lime green coral bells, Lady’s mantle, Sum & Substance hosta, fats japonica, green gladiolas, Mediterranean spurge and Bell of Ireland, of course

So besides all that clover that is flourishing with all these spring rains, enjoy everything green in your garden. The Irish have observed this day for over 1,000 years and so can you.

Design trends

Arbor Day in California

Plant a Strawberry tree like this one. My neighbor Grace loves to sit in it.

California’s Arbor Day is celebrated on March 9th this year. It’s actually a whole week n honor of famed horticulturist Luther Burbank’s birthday. The day is celebrated on different dates around the world because one of the features of Arbor Day is the planting of trees which is best done at certain times of the year in your area. The simple goal of this day is to inspire people to plant, nurture and celebrate trees.

We are fortunate to live in a temperate rain forest with lots of trees. Our redwoods are especially important in our biodiverse watershed as is all flora and fauna in the forest. Redwoods and many native trees keep our environment moist. Let’s make it a priority to protect them and pass the baton of stewardship to our children who will inherit this place.

So whether you’ve been thinking about planting a redwood, heritage oak or other native tree, a fruit tree to feed the family, a shade tree to save on summer cooling, a flowering tree to attract pollinators, or a tree to hang the hammock on this is a good time to plant as well as nurture and celebrate all trees..

Trees are remarkable in how they grow and adapt to their environment. Some trees, like redwood, ponderosa pine, sycamore and madrone have especially beautiful bark. This is the tree’s protection from the outside world. Continually renewed from within, it helps keep out moisture in rain and prevents the tree from losing moisture when the air is dry. Bark insulates against cold and heat and wards off insect enemies.

The inner bark, or phloem, is the pipeline through which food is passed to the rest of the tree, It lives for only a short time, then dies and turns to cork to become part of the protective outer bark.

The next layer in is the cambium cell layer which is the growing part of the trunk. It annually produces new bark and new wood in response to hormones that pass down through the phloem with food from the leaves. These hormones are called auxins and stimulate growth in the cells. They are produced by leaf buds at the ends of branches as they start growing in spring.

Inside the cambium layer is the sapwood or xylem which moves water from the roots to the leaves. Sapwood is new wood. As newer rings of sapwood are laid down, inner rings lose their vitality and turn to heartwood.

Finally, the central supporting pillar of the tree is called heartwood. Although dead, it will not decay or lose strength while the outer layers are intact. A composite of hollow, needlelike cellulose fibers bound together by a chemical glue called lignin, it is in many ways as strong as steel.

Leaves make food for the tree. Their shapes help them reduce wind resistance, shed rain that could decay the leaf if left standing and produce chlorophyll. The narrow needles of a Douglas fir, for instance, exposes as much as three acres of surface to the sun.

Be kind to all trees. They are a valuable asset to your home and our environment. Earth Day is next month on April 22nd. Let’s continue to celebrate the natural beauty of our planet and learn what we can do to keep it healthy.