Thursday, May 25, 2017

The Natural Gardener: Aphids on Roses are Good


          A couple of weeks ago, I saw a bad infestation of aphids on Betty Boop, my favorite rose.  I also saw some soldier beetles already on the job, eating them.  I checked them a few days later, and both aphids and soldier beetles were gone.



But I know that those soldier beetles laid eggs under the leaf mulch in my beds, and their larvae will be patrolling under that mulch for the next 10-11 months, eating any insects they can catch and kill.  They pupate and become adults in April and May and emerge, ravenous for aphids to make their eggs.
I learned this the spring after I bought my house, in 2000.  All the roses that came with the property were heavily infested with aphids, and I waited for weeks for lady beetles to show up and clean them up and make their young, who likewise eat aphids.  But the infestation just got worse, until I got nervous and decided to spray them with soap.  I was heading out there with the spray bottle in hand, when I saw about 50 soldier beetles flying around the most infested bush and mating—so I didn’t spray but I did look up these red and black beetles and learned their habits.  Within a few days, both aphids and soldier beetles were gone.
I had been waiting for lady beetles because, in Arizona, I had a single broccoli plant that was infested with aphids.  I had learned that aphids are specific for particular types of plants.  This being the only brassica in my garden, I knew there was nothing else that they would eat, so I didn’t pull the plant, wanting its seeds.  After a while, it became a lady beetle factory, feeding at least 100 of a several different sizes and colors of lady beetles, including young and pupae.
But here in Southern Oregon, lady beetles have to compete with soldier beetles, which, with their short adult life span, are more ravenous when they emerge from the mulch.
Later in the summer, I tend to have aphids on corn, which attract lady beetles in large numbers and don’t really hurt the corn.  They also do the same thing on sun flowers, though birds are more likely to eat them there.  A couple of years, I had large, grey aphids on my fringe pussy willows, which were eaten by hummingbirds, chickadees and woodpeckers.
Aphids are manna for predators that eat them, crowding together in large numbers for easy picking, full of sugar as well as protein.  Those that grow on poisonous plants, like hellebores, often are not eaten by anything.   I have seen soldier beetles eating aphids on hellebores, but only once, so I am more likely to spray them there.  But most of the time, they are useful to bring in predators that might stick around and eat other insects as well. 
But soldier beetles won’t lay eggs where there isn’t any mulch cover for their young.  Don’t use finely-ground bark, which leaches its natural preservatives into soil and kills everything in the soil but plants.  Coarse bark, like walk-on fir or nugget bark, can provide shelter and help keep soil moist, but the best garden mulch is leaves, which feed fungi and soil life and become rich soil.
         
Rycke Brown, Natural Gardener          541-955-9040        rycke@gardener.com

Tuesday, March 7, 2017

The Natural Gardener, Gardening in March


          March has come like a white wolf in sheep’s clothing, with snow in the middle of a week of rainy weather on the 5th and 6th.  Can’t garden until it melts, but unlike the storm in January, it is gone on the 7th.  February didn’t have its usual two-week break of warm, sunny weather; there was some sun between the rains, but not a lot of warmth.  Daffodils barely started to open, when they are usually in full bloom by mid-month. 
          We are told, in this area, that we should cut back the roses when the forsythia blooms, but as often happens, roses have broken buds and are leafing out well before the forsythia even breaks a bud.  This gardener crowned most of her roses before the end of February, though there remain two customers who haven’t been served yet.  Not to fret; growth is slow and little will be lost in waiting another week or two. 
We cut roses back to the crown, the hard knot of wood at the base, rather than the usual foot tall, because black spot grows all over the stems, and will just re-infect the leaves if any stem is left on the crown.  Nearly every rose in town has black spot due to our mild winters, though Rosa rugosa is pretty resistant.  This is not the only time one can crown a rose.  A rose crowned during the spring growing season will come back to nearly full height and bloom within a couple of months.  Crowned in summer, it will grow back and bloom even faster in the heat. 
March has the equinox, the day and night of equal length, on the 20th.  One can plant cannabis clones or seed outside after this date, and they will not bloom prematurely as long as one does not deprive them of the increasing day length before 6 weeks after planting.   The way to do that is with a “light depo” or light deprivation house, in which one pulls a cover over the plants to give them only 12 hours of light, which starts them blooming heavily and makes their buds more solid.  These are being advertised on the radio and elsewhere.  
This year, it may pay to wait a little longer to plant, for sunny weather to warm the soil up, as your clones or seedlings will be eaten by bugs if they are planted in soil too cold to get them growing.   The same goes later for regular summer food crops; if bugs eat your plants, replant.
But now is a good time to plant peas, potatoes, onions, lettuce, spinach and other greens, preferably from seed or bulb.  Pansies and petunia plants are in the stores and will be happy in the chilly ground.  Cyclamen and hellebores are blooming and will be available at the Growers Market this month.

Blueberries at Sandy's Nursery.  Southern "Legacy" are on the right, with leaves.

It is time to plant blueberries, which are available now at Sandy’s Nursery in #2 pots.  They have included one variety of Southern, Legacy, with their usual Northern varieties.  Southern blueberries take our hot Southern Oregon summers a bit better than Northern varieties; they keep most of their leaves through the winter and will drop them after they bloom and new leaves grow.  Their branches are thinner and their leaves smaller, and they often turn colors through the winter.
Keep in mind that blueberries want to be planted in very loose, rich soil.  If yours is not loose enough to dig with your gloved hands, put the plant on top of the ground and surround it with compost to the top of the roots and at least 3 feet wide.  Unlike most other potted shrubs, blueberries will sink into the soil as the compost around it is worked in by worms, rather than being left high and dry.  
Their spongy root system does not grow deeper than about 6 inches for about 5 years, when they put down a deep taproot for water.  To grow big blueberries before that, run a mister near your plants through the heat of the summer to keep them happy, and always keep their roots covered with coarse bark, straw, or hard leaves that will stick around, like oak leaves or pine needles.   They want full sun and their feet well covered and cool.
         
Rycke Brown, Natural Gardener          541-955-9040        rycke@gardener.com

Thursday, February 2, 2017

The Natural Gardener: February Gardening


          February in Grants Pass is when the garden and the gardener really start to wake up.  January has its snowdrops, but we don’t really care; it is too cold and dreary to draw us outside.  In February, sunny days get warm enough to make cold weather gear too warm by afternoon, and coax crocuses and daffodils to bloom.

Daffodils in oak leaf mulch for weed control.

February is the time to kill annual springweeds like bitter cress, heron’s bill, groundsel, foxtail and cheat before they bloom and spread; it has been since October, when they started to grow and some started to bloom.  Cut any annual weed under the crown and it will be gone; you can clear a lot of them quickly with gardening scissors or a knife. 
Winter is also time to cut and dig rampant perennials like violets that are in stasis until this month, when they will start to bloom in earnest, set seed and make the matter more urgent.  Cut blackberries back and dig out their crowns.  Dig excess raspberries, transplant them, and prune out dead canes.  You still have time to transplant trees, shrubs and perennials while roots grow before spring top growth begins.  Winter is the best time to do heavy tree pruning with a saw, but lopper work is better done in midsummer.  "Crown" your roses when their buds start to grow, cutting them to the hard crown at the base to stop black spot until fall.
It is also time to start new gardening beds with compost, edging the beds with 6-12” boulders, choosing rocks with flat bottoms from the pile at Copeland.  Leaves can be used in the fall, several inches to a foot thick.  But new beds can be started at any time of year with compost.  One can build compost beds in the heat of summer for summer vegetables and fall perennials, or in the depths of winter for winter and spring planting.  Two inches is good for ornamentals, but six inches will give them a better start and grow great vegetables. 
Compost needs to be covered with coarse mulch like walk-on fir or nugget bark to protect it, roots and seedlings from rain, wind, and drying sun.  Avoid using fine bark, which kills soil with its natural preservatives. 
Blueberries and azaleas don’t even like to be planted into plain soil; they do better set on top of the ground and surrounded by compost covering their roots; their fine, spongy roots will sink into the soil as the compost is worked in by worms.  The more general rule is that #1 pots and larger need to be planted in soil, or they will be left high and dry as the compost is worked in and rots, while 4” and smaller pots will sink into soil with the compost.
          Paths need to be controlled too.  Two inches of wood chips, walk-on fir or ¾ inch nugget bark, will stop most weeds for a season, but need to be refreshed yearly.  4 x 8 sand, ¼-1/8 inch sifted river sand available at Copeland, laid one inch deep, covers mud and makes it easy to hula-hoe and rake young weeds as the sand brings them up.  (It also is good for starting a lawn and covering its mud.)  It is also easy to clean 4 x 8 sand by blowing and raking the tree trash into the beds for mulch.  Some trees, like mimosa, demand it, as they drop sticky flowers half the summer, leaves in the fall, and seed pods all winter, none of which are easy to clean off bark or chips.
         

Rycke Brown, Natural Gardener          541-955-9040        rycke@gardener.com

Thursday, January 26, 2017

The Weekly Weeder: Prime time to kill spring weeds


          This year, I am concentrating on weeding out heron’s bill and other spring-blooming weeds through the winter, after spreading leaves in selected locations all fall to try to smother them out.  This year, most of them got started in the fall before falling leaves were even available, as we got early cool rain.  Even then, most of the bags of leaves could not be spread while gathering truckloads of them; I was gathering piles of bags for me and my customers while the getting was good and am still spreading them on one property.  A lot of weeds got smothered; some will get through.
          Today, I will be cutting heron’s bill out of Schroeder Park’s tent campground, where it is fairly easy to weed from the silty ground, there being little perennial grass for it to hide in there.  While I’m at it, I will be pulling groundsel, which is already putting out flowers and seed in many places.  Over the summer, the main target was goatheads, but I was cutting heron’s bill then, too, brought up by cooling irrigation water in late summer.
On February 4th, there is a “Weed Wrangle” in Griffin Park, starting at noon.  It is focused on pulling out Scotch broom, an invasive evergreen perennial shrub that is a great fire hazard.  It appears that they will be demonstrating the Uprooter, an amazing tool for pulling out shrubs.  But my focus will be on heron’s bill on the downriver side of the boat ramp, where I was cutting goat heads this summer.  There were young heron’s bill down there then, but I was concentrating on the goat heads, knowing that the heron’s bill could wait until now; it is not yet blooming.
Another target this time of year is bitter cress.  I used to wait until it and many other weeds flowered to pull them, because that is the easiest time to pull them, as the flowers show them up; their stems are strong; and the root is reduced and pulls right out in most cases.  But they are numerous; they all want to bloom close to the same time; and they tend to disappear into the greenery once their little white flowers are done blooming, until they ripen and start popping seeds, when they turn creamy yellow-white and show up bright and ugly, too late to stop the seeds from spreading. 
So I’ve learned it pays to pay attention to them and other weeds before they flower, and cut them as I see them, under the crown, from whence all growth of annual weeds comes.
                             

Rycke Brown, Natural Gardener          541-955-9040        rycke@gardener.com