Category Archives: gardening tips

Gardening tips for late March in the Santa Cruz Mountains

In like a lion, out like a lamb. This phrase describing refers to the position in the sky of the constellation Leo, the lion, at the beginning of the month and Aries, the ram or lamb, at the end.  As I write this week’s column, the saying rings true so far this month.  Beautiful weather and more daylight hours to enjoy it. What’s not to like?

There’s so much to do now in the garden. If you are feeling overwhelmed here are some suggestions for the more important to-do’s.

* Check drip systems for leaks or clogged emitters. Flush sediment from filters and check screens for algae. You may need to add emitters if plants have grown significantly.

* Finish pruning and clean-up of trees, shrubs, vines and perennials. this includes fireblight die-back on pears, apples, hawthorn, pyracantha, photinia, crabapple quince and toyon., Prune out and discard diseased branches making the cut at least 6-8" below blighted tissue. Clean the pruning blades with a 1:5 solution of household bleach to prevent spread of the disease. Also finish pruning and cutting back perennials and ornamental grasses. Go ahead and give grasses a 3-5" crewcut so fresh growth can emerge. Cut back old foliage of maiden hair ferns to allow new growth to take center stage. If you have Western sword ferns or another type that has winter or thrip damage, remove shabby looking fronds. Even if you have to cut back the entire fern it’s OK. It will regrow in just of couple of months.  Prune any other frost damaged plants when you see new growth begin.

* Spread fresh compost 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 compost and or mulch on top of the soil and let it slowly decompose and filter down into the earth.

* As you plant new additions to the garden add organic matter to the soil. If your garden’s soil is sandy, organic matter enriches it and allows it to hold water more efficiently. If your soil tends toward heaviness, organic matter loosens it up and improves drainage. In well-amended soil, plants grow deep roots, are hardier and more resistant to disease. Organic matter, like compost, planting mix and well-rotted manure, boosts nutrition and improves soil structure.

* Fertilize if you haven’t already done so. Citrus, shrubs and fruit trees just emerging from dormancy are begging for their first meal of the season. Lawns begin their spring growth now also and benefit from a boost of nitrogen. You can also spread a thin layer of composted manure over you lawn. Leaving you grass clippings on the lawn will benefit it by shading 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 and a light application of balanced fertilizer. They respond to phosphorus especially in the spring for root growth, stem sturdiness and flower development. Wait until azaleas, camellias and rhododendron have finished blooming before feeding them.

* The most important to-do for March 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.

What to do in the Garden in February in the Santa Cruz Mountains

While you’re out in the garden between rain storms:


* Revitalize overgrown or leggy hedges by cutting back plants just before the flush of new spring growth.
* Fight slugs and snails now with an iron phosphate bait like Sluggo before they start feeding on your young seedlings and new transplants.
* Spray for peach leaf curl one last time before buds begin to open. Do not spray 36 hours before rain is predicted.
* Begin sowing seeds of cool season vegetables outdoors. If it’s been raining heavily, allow the ground to dry out for several days before working the soil. Plant seeds of beets, carrots, chard, lettuce, peas, spinach, arugula, chives kale and parley directly in the ground. Later in the month start broccoli, cabbage and cauliflower. Indoors, start seeds of tomatoes, peppers and eggplant so they will be ready to transplant outdoors in 8 weeks.

Fertilize.  Perennials, shrubs and trees will get their first dose of organic all-purpose fertilizer for the season. Wait to feed azaleas, camellias and rhododendrons until the last flower buds start to open. Roses will get a high nitrogen fertilizer to give foliage a boost and next month, I’ll feed with a high phosphorus fertilizer to encourage blooms.
Cut back woody shrubs  To stimulate lush new growth on plants like Mexican bush sage, artemisia and butterfly bush cut back to within a few inches of the ground. Don’t use this approach on lavender or ceanothus, though,  only lightly prune them after blooming.  Prune fuchsias back by a third and remove dead, crossing branches and interior twiggy growth. Container fuchsias can be cut back to the pot rim.
Feed chelated iron to azaleas, citrus and gardenias to green up their leaves. Cool soil makes the leaves of these plants yellow this time of year. 
Divide perennials. My garden is shady all winter and I have better results if I transplant and divide plants in late winter. Agapanthus, asters, coreopsis, daylilies, shasta daisy and liriope are plants that tend to become overcrowded and benefit from dividing.

Microclimates, Rainfall and Pests

Gardening in our microclimates might be challenging and it’s no different here in Maui. Yes, despite the balmy weather, the rainfall here limits what plants thrive. You can drive 5 minutes from an area that receives 400" of rainfall per year to another spot 10 minutes away that gets only 19" per year. Then drive another 15 minutes and you’re in a desert-like area with annual rainfall of 10" while the east side of the island, in Hana, is getting 83 inches.

Gardeners in Maui in several ways just as we do. One way is to grow the right plant in the right place. For example, at 4000 ft elevation near the volcano, 55,000 lavender plants  of 45 varieties grow happily in rocky soil. Olive trees – brought over from Santa Cruz – dot the fields. Interesting to note that the lavender plants provide a natural pesticide against the ants that invade the protea flowers. Proteas do well here. Reminded me not to miss our spectacular show of proteas  at the UC Arboretum in April and May. If you’ve never walked through this free garden it’s a treat not to be missed.

If you think all the soil here is of volcanic origin, think again. Of the 12 types of soil in the world, 7 different orders occur here.   The state of Hawaii, as a whole, has 11 types, more than any other state in the United States. By comparison, Maine has only 4 types while the Santa Cruz Mountains has a whopping 9 orders just in our little corner of the world.  Yes, folks, that’s right. No wonder gardening can be a challenge where we live.  What thrives up the road from you doesn’t always grow the same in your yard. Knowledge of soil behavior and nutrients is important where ever you garden.

Maui has a native pea, a native coffeeberry and a native huckleberry just as we do.There is even a native hydrangea although the type we are most familiar with was brought over from Japan in 1790.  Mostly, you see flowering plants introduced from other parts of the world.  Since the 1800’s, people have been bringing all types of plants to the island just like early settlers did to our area. Many of the plants that we commonly grow like the Princess flower ( tibouchina ) and strawberry guava are invasive here. Others like blue plumbago bloom in the drier areas and behave themselves. Gardeners here face the same problems as we do and strive not to dilute the native gene pool.

The rain in Maui is distributed throughout the year which is different than our Mediterranean climate. Before you get jealous, though, this allows slugs, white fly and fungus to proliferate year round. I see mealy bug under most of the plumeria leaves. This intoxicatingly fragrant tree is easy to propagate and grows everywhere on the islands. If you get at least 6 hours of hot sun per day and keep them inside or a greenhouse above 50 degrees at night they will bloom even in our area.

I’ve enjoyed my time in Maui but there’s no place like home.