What Zone Are We?

Spring is coming. Like me, you’re  probably anxious to get started in your garden. We’ve gotten some much needed rain and hopefully there is more to come. As you’re thoughts turn to gardening, though, make sure those new plant choices are the right ones for your area.

Notice how much sun or shade an area gets during the growing season- from April through September. Knowing  also which Sunset climate zone you are in is equally as important to make sure your garden thrives. Every year I get asked which zone the areas of Scotts Valley, San Lorenzo Valley, Bonny Doon are in. It’s confusing in Sunset Western Gardening Guide as our area has many microclimates and their map is not detailed enough to reflect this. They even show Felton as being on a ridge top instead of on the valley floor. Here are some tips to help you determine in what zone you garden.

Zone 7  has the coldest winters in our area.  Very high ridge tops like the Summit area and the most northern portions of Bonny Doon lie in this zone.  My records show average winter lows ranging from 15-25 degrees based on 20 years of input from gardeners in these areas.  This does not apply to other areas of zone 7, just those around here.   Record lows have occurred during freezes in 1990, 1996 and 2007 but as gardeners we rely on average highs and lows to help guide our planting times.  Spring weather comes later in this zone with the growing season mainly from April – October.

Zone 15 – this zone encompasses most of our area.  Winter lows average 20-30 degrees. The valley floor of both San Lorenzo and Scotts Valley lie in this zone and are what I call "a cold 15".  Cold air sinks and is trapped in these areas. Often there is damage to the tips of oleanders and citrus while gardenias and tropical hibiscus need extra protection.There are warmer parts of this zone, though, where the growing season starts in March and ends in November.  These areas rarely get a freeze after March 15th or before Thanksgiving.

Zone 16 – those who live up off the valley floor but below ridge tops live in this "banana belt". Pasatiempo also falls in this thermal zone.  Light frost can occur during the winter but mostly the winter lows in this zone stay above freezing. Lucky you.

 

How and Why to Mulch

We never stop learning. No matter how much we think we know about a subject, there is always more to learn. 


Take mulching, for example.  Mulching is simply covering the soil around plants with a protective material, organic or inorganic.  This helps maintain moisture in the garden, decreases soil compaction, modifies soil temperatures and adds nutrients and humus to the soil as they decompose. 

It’s that time of year to mulch existing perennials, shrubs and trees. While a little chicken manure is good worked into the veggie garden, composted horse manure works better as a mulch for the rest of the garden.  Chicken manure is high in phosphates and too much can inhibit beneficial microbes in the soil.  It also feed the weeds.  They love it.  A better method would be to cover a layer of compost or  composted horse or steer manure with a thick 4" layer of wood chips.

Wood chips offer additional benefits: They’re local, free from arborists, and affordable from the transfer station in Ben Lomond  . Any disease in the chips doesn’t transfer to healthy plant roots, as long as you don’t dig the chips into the soil.  You can also buy clean chips from landscape supply yards or in convenient bags from nurseries.

To make the most of , learn what kind of soil you’re working with.  The University of Massachusetts at Amherst  ( www.umass.edu/plsoils/soiltest/ ) offers a basic standard test for $9.  It includes  pH, buffer pH, extractable nutrients (P, K, Ca, Mg, Fe, Mn, Zn, Cu, B), extractable heavy metals (Pb, Cd, Ni, Cr), and extractable aluminum, cation exchange capacity, percent base saturation. 

Our local soil testing laboratory in Watsonville, Perry Laboratory, offers a comprehensive test.  Their web site is  www.perrylaboratory.com.  The landscape package they offer includes basic fertility, micronutrients, salinity, alkalinity, texture, organic matter content and lime content. The main difference between the two labs is that Perry’s  will give you  specific recommendations based on your results to improve your soil. 

Make sure you get fresh mulch spread over your garden plants soon.  You’ll be amazed at the difference in your garden this season.  A mulched garden is a happy garden. 

Start your cool season veggies

Plants and trees know when it’s time to bloom and begin growing for the season.  Driving around our area I’ve seen the huge flowers of the saucer magnolias starting to unfurl. Many plum trees look like pink clouds they have so many blossoms. It’s time to start planning and planting the vegetable garden.
 
Towards the end of this month start your tomato and pepper seeds indoors so they are ready to transplant outdoors in 6-8 weeks. Meanwhile, begin sowing seeds of cool season vegetables outside. Prepare the soil by amending with compost and plant seeds for carrots, peas, spinach, beets, chard and lettuce. You can get a jump on your spring harvest by setting out starts of broccoli, cabbage, cauliflower and green onions.

If you don’t want to wait even that long to start eating your own healthy vegetables, try growing micro greens inside your house like houseplants. It’s similar to sprouting alfalfa, cress, sunflower and buckwheat seeds in a jar and eating them before the second set of leaves emerge. Micro greens, however, can be grown in soil, sprinkled on sponges or fine textured fabric. Because they won’t be around long enough to flower or fruit, they don’t need much light. . It takes about 30 days for micro greens to set their first leaves and be ready to harvest. When the first leaves appear they are at the peak of their nutritional concentration.

What do they taste like? Well, carrot greens, after they set their first true leaf, taste exactly like a carrot. Emerging radish leaves are spicy, cabbage is mild, while sunflowers are nutty. The first swiss chard leaf tastes like spinach, beets have an earthy flavor and kale is slightly sweet. The most intense flavor comes when that first leaf opens as they begin to manufacture energy from light.  Think of them as chia pets you can eat.

Fruit & Flowering trees from Bare Root

A couple of weeks ago I wrote about how to get a bare root plant off to a good start in your garden.  Over the years I’ve planted Floribunda crabapple, Autumnalis flowering cherry, Eastern redbud, Purple Pony and Blireiana flowering plums and Jacquemonti birch all from bare root.  They’re soooo easy to plant this way.  If I had more roomand sun these are some of my favorite trees that I’d add to my own garden this year. 

If you want a tree that’s both highly ornamental and produces great tasting fruit as well, try Saturn flowering and fruiting peach.  The fruit is large, yellow, freestone and delicious.  As if mouth-watering flavor isn’t enough the tree produces masses of large, double, pink flowers making a spectacular show in the spring that rivals the most ornamental cherry tree.

I love flowering crabapples not only for their spring blossoms but for the small fruits that attract birds in the fall and winter and Prairifire is one of the best.   Red buds open to bright pinkish red single flowers that cover the 20 foot tall tree.  Purple foliage follows which turns bronze green by summer.  Fruit is deep red, only 1/4" in size, and hangs well into winter on the tree.  This crabapple has excellent disease resistance to scab, cedar-apple rust, mildew and fireblight which sometimes plagues some crabapples.  It would make an outstanding ornamental tree in your garden.

I eat a lot of almonds.  One handfull is only 160 calories and is an excellent source of vitamin E and magnesium and a good source of fiber and phosphorus as well as protein, potassium, calcium and iron.   I’d plant a compact Garden Prince almond if I had just a little more sun.  They grow to 10-12 feet and can be pruned easily to 8 feet.  Soft-shelled, good quality sweet kernels ripen in late September to early October on self-fertile trees that set large clusters at a young age.  Dense, attractive foliage follows showy pink blossoms. 

Looking for a tree to provide shade for the patio table?  How about a drought tolerant Golden honeylocust? Fast growing to 40 feet tall with a 35 foot spread this beautiful tree’s leaves emerge a bright, golden yellow at the tips contrasting with the deep green inner foliage making it look like a flowering tree bursting with bloom.  Seedless and thornless, this tree has spreading arching branches and casts filtered shade, allowing growth of lawn or other plants beneath the tree’s canopy.  It’s tolerant of acid or alkaline soils, drought, cold, heat, and wind.

Another good shade tree to consider is the Golden Rain tree.  Enormous panicles of golden yellow flowers drape from the branches in the summer when you spend more time outdoors.  Fat, papery fruit capsules resembling little Japanese lanterns last well into autumn. Growing about 30 feet tall,  open branching casts light shade underneath,  perfect for a hammock on the lawn but this tree would also be a good patio or street tree.  Very adaptable to different soils as long as drainage is good.

This last suggestion is just plain fun.  If you have the room and enjoy putting together flower arrangements, why not plant a ?  Long silvery catkins covered with pink caps are very showy in the winter when the plant is dormant.  The mature height is 15 feet tall with a 10-15 foot spread but can be kept to shrub size by cutting to the ground every few years.

Remember that while these trees and also the pussy willow need six hours or more of sun during the growing season they are dormant in winter and don’t mind being in shade for that part of the year.  So if you live where winter sun is scarce you can still grow edibles and ornamentals successfully.