Monthly Archives: June 2016

citrus fertilization, citrus trees, fertilizing, gardening tips, plant care, plant maintenance

Troubleshooting Plant Problems

Troubleshooting is a form of problem solving. And whether it?s a car problem, your smart phone, an irrigation system or yellowing leaves on a plant the goal is to solve it and make the product or process operational again. When you eliminate the potential causes of the problem hopefully the solution restores everything to its working order. Sounds like something Sherlock Holmes would say and it?s sometimes easier said than done as we all have experienced.

burned_heuchera_leaves
sunburned heauchera leaves

A few weeks ago I received a text with pictures of some plants with brown spots and asked what I thought might be the problem with their plants. This was after the heat wave we experienced and after asking a few questions about irrigation, location and how long the plants had been in the ground, I determined that the plant leaves had been burned in a pattern consistent with the location of the beating sun. At this time of year plants are growing wildly and need a good soak moistening the entire root zone. The solution: Better to water deeply less often than lightly which might not reach all the roots.

The subject of how much fertilizer and what kind came up in another troubleshooting email thread between some fellow horticulturalists. The issue was whether to use another round of organic high phosphate fertilizer in order to encourage bud development on a notoriously short-season tree dahlia. After some lively discussion we decided that the early spring application of rock phosphate was sufficient. Sometimes adding too much phosphorus may actually hurt a plant by preventing the uptake of other nutrients which must also be available to the plant in order to prevent unexpected deficiencies to appear. A balanced fertilizer containing all three nutrients- nitrogen, phosphorus and potassium-was recommended for the remainder of the season.

yellow_lemon_leaves
yellow leaves on lemon

Then there were some problems in my own garden. Well, it seems I am always trying to solve something with plants, pests or critters but this was with my lemon tree. At first I was perplexed when the older leaves of my lemon tree started turning yellow a couple months ago. The new growth looked fine so it wasn?t an iron deficiency where the young leaves display green veins along with the yellowish color.

It wasn?t a nitrogen deficiency either where the mature leaves slowly bleach to a mottled irregular green and yellow pattern, become entirely yellow and then are shed while the discoloration spreads to the younger leaves. I had fertilized in March with an all-purpose balanced fertilizer. Citrus are heavy feeders and require a steady source of nitrogen, the ideal citrus fertilizer having a ration of 3:1:1 (N:P:K)

After eliminating other mineral deficiencies or overwatering as the problem I decided that my lemon was simply dropping interior leaves which is normal after winter but I wanted to trouble shoot all potential causes to be sure citrus greening wasn?t the culprit. If it had been this deadly disease the leaves would have exhibited an asymmetrical pattern.

To quote Sherlock Holmes ?Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth.? I?ll try to remember that when I?m troubleshooting my next problem in the garden.

birds, California Native Plants, California natives for containers, container gardening, Uncategorized

California Natives for Containers

My ambitious plans to augment this garden here in Bonny Doon with California natives and colorful plants to attract birds and wildlife is not turning out exactly as I?d pictured. I thought that I had licked my gopher problem by planting everything in baskets. Not so, now they just come up next to their plant of choice at night and eat whole thing from the top, dragging the rest down into their neat little hole while leaving the root still snug in its basket. Hopefully, some will regrow from the roots.

rhododendron_occidentale3
Western azalea

But I?m not giving up on planting for the birds and bees. I?ve got plans to increase my container garden collection. Gardening in containers is easy. I can control the soil, water and light and the gophers can?t undermine my efforts. There are a lot of California native plants that do well in containers and I?m going to place them where both the birds and I can enjoy them.

For some of my largest containers I?ll choose from natives like Western Azalea, Deer Grass, Chaparral Pea or Giant Chain Fern. Any of the taller growing ceanothus and manzanita would look great too by themselves or combined with smaller growing plants.

mimulus_JellyBean_gold
Mimulus ‘Jelly Bean Gold’

For small to medium containers I can use Conejo Buckwheat, Hummingbird Mint, Penstemon Heterophyllos, Mimulus, Woolly Blue Curls or Coastal Daisy, These combine well with colorful Lewisia, Dog Violets or Wild Strawberry.

I might combine a madrone with a Canyon Gray Coastal Sagebrush – Artemisia californica – which grows about a foot high and will trail over the side of the container adding beautiful gray color to contrast with the rich green of the other leaves. I also like the combination of California Hazelnut, Deer Fern, Redwood Sorrel and Wild Ginger.

Some of the most dramatic containers utilize the concept of combining a thriller, some fillers and spiller or two. Not all my containers will use this formula but I seem to be drawn to those that do. Plants in nature can be quite random in the way they grow together and still be lovely. Containers need a bit more order to dazzle and direct the eye.

Thrillers act as the centerpiece of a container. They are usually big, bold and beautiful. Giant Elk Clover is one such California native that is an attention getter. Chilopsis linearis-Desert Willow is another great subject for containers as it is slow growing and beautiful in leaf and flower. Other architectural natives that will catch your eye as the centerpiece of a container are Hibiscus or Rose Mallow and Pacific Dogwood. The thriller goes in the center of the pot or if your container will be viewed from only one side it goes in the back.

Next come the fillers. They can be foliage or flowering plants but they should complement and not overwhelm your largest plant. Usually they have a mounding shape and I?ll plant several around the thriller. Good fillers include Heuchera Maxima and Western Maidenhair Fern.

OLYMPUS DIGITAL CAMERA
California fuchsia

The last plants I?ll add are the spillers which are small and will soften the edge of the container. Redwood Sorrel, Wild Ginger and Miner?s Lettuce are good choices. California Fuchsia would look spectacular with its red or orange flowers and grey foliage spilling down the side of my container.

The best overall soil mix for natives in containers sharp sand and horticultural pumice added to a good potting soil. Never use perlite or that puffed up pumice because it will float and look terrible. Happy Container Gardening.

birds, garden design, gardening with cats, wildlife gardening

Gardening for the Birds with Cats

My garden is alive with birds. Butterflies and bees also seem to find it an interesting place to visit. When I first moved up to this house in Bonny Doon the prior owners had hung a couple of small hummingbird feeders which attracted only a few hummers. Their plantings consisted of manzanita and ceanothus varieties. Both great plants to attract birds but not much diversity. It felt like I was living in a void without the sound of song birds or the whir of hummingbird wings. It?s taken me a season or two but between the new plants I?ve added and the seed, suet and nectar feeders I?ve hung throughout the garden I attract dozens and dozens of my winged friends.

Sam_Birdsbesafe_collar
Sam Spade with his Birdsbsafe collar

How is this all possible sharing the garden with two cats? I knew right away that I couldn?t live with myself if I attracted birds only to have them endangered by Sam and Archer. As natural predators they couldn?t help getting into trouble. The problem was solved by the brightly colored, clown-like collar from Birdsbesafe they each wear that makes them more visible to birds. Neither wore a collar previously but they don?t seem to mind or notice they look like court jesters.

The birds in the garden are safe now or very nearly so and I?m happy too. It?s the height of breeding season and the birds are going nuts in the garden. I?m always on the look out for plants that will attract even more of these exquisite creatures. Fortunately there are many that have low water requirements which is a prerequisite these days.

Purple_finch copy
Purple finch

Trees that provide fruit, seeds, nectar and protein from insects attract many kinds of songbirds. Our native Big Leaf Maple is a favorite of the Evening Grosbeak who relish the seeds and early spring buds. Another bird magnet is the dogwood. Our Pacific dogwood as well as the Eastern dogwood and the hybrid of the two- Eddie?s White Wonder- are all very valuable sources of food for many birds. Their summer berries of dogwood are high in fat and important for migratory and wintering birds.

Lesser_Goldfinch
Lesser goldfinch

In every garden possible I try to include low water use shrubs and perennials that attract birds. My favorite Lesser Goldfinch is partial to the seeds of yarrow, buckwheat and aster. Kevin?s mahonia is favored by Western bluebirds. Blooming now in our own neck of the woods is Mexican elderberry. Their butter yellow flowers will form purple berries rich in carbohydrates and protein and attract an incredible number of birds.

Both hummingbirds and butterflies are attracted to flowers that provide nectar. Among their favorites that won?t break your water budget are natives such as penstemon and salvia. I always can find space for another variety of salvia.
Galvezia, mimulus, monardella, California fuchsia and ribes are also important nectar sources for birds in your garden. Add a couple non-native, drought tolerant perennials like lavender, gaura, coreopsis, verbena, scabiosa, lantana and wallflower and you?ll provide a feast for all your winged visitors.

Everybody loves winged creatures in the garden. Adding plants that attract birds, bees and butterflies is at the top of the list of requests for nearly every garden that I design.