Category Archives: container gardening

Container Gardening

This simple arrangement features red fountain grass as the
thriller with a sedum spiller.

When I moved up here to Bonny Soon from Felton I brought several hundred plants figuring that with over 2 acres of land I could put most of them in the ground. Many trees and shrubs did get planted but then I ran out of appropriate planting spots and just kept the rest in pots to create a container garden. Naturally, I?ve added more plants in pots ?cause I just can?t help myself when I see a colorful plant that will attract birds, bees and butterflies. My current count of potted plants is 253 so I?ve learned a thing or two about container gardening.

This container grouping for shade has just one type of plants per pot.

Mixed plantings in containers are the most dramatic with a thriller, some fillers and and a spiller or two but when I look around that?s not what I have the most of. Many of my large pots have trees like Dawn redwood, Japanese maples, flowering plums and cherries that I?ve had since the early ?90?s so I might underplant them with chartreuse sedum ?Angelina? or moneywort for a little color but that?s about it. I?ve found that even large trees and shrubs can survive in the same container for many, many years without root pruning or transplanting if they are fertilized once a year and watered thoroughly as needed.

In choosing a container, remember a porous clay pot will dry out fast in the summer sun as will a small pot. If you want pots on a sunny deck, you’ll have better results if your container is made or ceramic or colored plastic and is big enough to allow 2 inches of potting soil around the root ball. I don?t use water absorbing polymer granules in my containers as they are all in shade in winter and would stay too wet depriving plant roots of oxygen.

Water when the top 1 inch of soil in the container is dry. On a very hot day, watering mid day will cool the soil although I like to get my watering done early. Get to know your plants. Plants that are still growing into their containers need less frequent watering than those that are getting root bound. How much water? Water until it runs out the bottom and empty the saucer the next day if any water remains. Use a gentle nozzle that doesn’t dislodge the soil or compact it. Also make sure the water in the hose isn’t hot from lying in the sun.

Plants in containers are watered frequently and the water draining out of the bottom carries away nutrients. That said I have found that I can fertilize everything once a year with an organic all-purpose fertilizer like True 4-4-2. Blooming plants like abutilon, fuchsia, orchids, angel trumpet and the lantana, which I grow because the chipmunks don?t nibble them, receive a water soluble fertilizer once a month. Water soluble fertilizers are fast acting. Dry granules and time release capsules last longer. Organic fertilizers tend to work more slowly and are especially ideal for trees, shrubs and long lived perennials or for large planters in which you keep the same soil from year to year. Be sure plants are moist before feeding. The best fertilizer is the one that you get out of the package and onto your plants.

A group of succulents and cactus at Succulent Gardens in Castroville.

Be sure to use a quality potting mix in your containers. There are special succulent and cactus mixes available but succulents are forgiving as long as the soil drains freely. Don’t add gravel or clay shards at the bottom of the pot as this impedes drainage. It work best to fill the entire pot with soil, top to bottom with a screen over the hole to keep out earwigs and sowbugs.

You can grow anything in a container. Think of them as furnishings. Grow herbs and other edibles near the kitchen door, fragrant flowers to attract beneficial insects, hummingbirds and butterflies, California natives or even plants that glow in the moonlight.

How to Plant a Spectacular Container Garden

There?s something about a beautiful container overflowing with interesting flowers, foliage or succulents that always gets my attention and although I already have 241 containers I?m always on the lookout for ideas to create one more.

Wall planter with ivy geraniums

You can grow anything in a container. Think of them as furnishings. Grow herbs and other edibles near the kitchen door, fragrant flowers to attract beneficial insects, hummingbirds and butterflies, California natives or even plants that glow in the moonlight.

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. Next come the fillers. Fillers 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. The last plants are the spillers which are small and will soften the edge of the container.

When planting mixed containers never use more than three plant

Mixed container planting

colors, two is sometimes enough. That doesn?t count green unless it?s lime. Skimpy pots are a miss, pack the plants so the pots are full when you’re done. You want the pots to look good right away. Big pots, at least 16″ across are dramatic and make a nice contrast to matching smaller ones.

In choosing a container, remember a porous clay pot will dry out fast in the summer sun as will a small pot. If you want pots on a sunny deck, you’ll have better results if your container is made or ceramic or colored plastic and is big enough to allow 2 inches of potting soil around the root ball. I don?t use water absorbing polymer granules in my containers as they are all in shade in winter and would stay too wet depriving plant roots of oxygen.

Water when the top 1 inch of soil in the container is dry. On a very hot day, watering mid day will cool the soil although I like to get my watering done early. Get to know your plants. Plants that are still growing into their containers need less frequent watering than those that are getting root bound. How much water? Water until it runs out the bottom and empty the saucer the next day if any water remains. Use a gentle nozzle that doesn’t dislodge the soil or compact it. Also make sure the water in the hose isn’t hot from lying in the sun.

Plants in containers are watered frequently and the water draining out of the bottom carries away nutrients. Actively growing plants need regular feeding from spring to early fall. Water soluble fertilizers are fast acting. Dry granules and time release capsules last longer. Organic fertilizers tend to work more slowly and are especially ideal for trees, shrubs and long lived perennials or for large planters in which you keep the same soil from year to year. Be sure plants are moist before feeding. The best fertilizer is the one that you get out of the package and onto your plants.

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.

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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.