Syringa pekinensis

Syringa pekinensis:photo by Robert Pavlis

Syringa pekinensis is a small multi-stemmed tree that would fit most gardens. It has large clusters of cream-white flowers and exceptional exfoliating bark. If it had great fall color it would be one of the most popular trees on the market, but unfortunately the leaves just go brown.

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Heptacodium miconioides

Heptacodium miconioides, by Robert Pavlis

Heptacodium miconioidesis a small tree or large shrub that provides year long interest, especially in late summer and fall when it appears to flower twice; once in white and then again in red. The white flowers form in bunches of 7 which gives the plant its common name of seven sons plant. After flowering, it forms small fruits and red calyx that are as large as and showier than the flowers.ย 

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Colchicum autumnale – The Life Cycle Explained

Colchicum autumnale, commonly called the fall crocus has one of the most unusual life cycles of any plant in my garden. It flowers with no leaves and it’s seeds are stored underground for part of the year. In a given gardening season it flowers first, then rests, and then makes leaves. This is one mixed up plant that has developed a very unique and interesting life cycle.

When should you move the corms – they are not bulbs? When can you collect the seed? Important information like this becomes clear once you understand how Colchicum autumnale grows – their life cycle.

Colchicum autumnale in fall showing flowers. The leaves are from a hydrangea bush, by Robert Pavlis
Colchicum autumnale in fall showing flowers. The leaves are from a hydrangea bush, by Robert Pavlis

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Origanum โ€˜Kent Beautyโ€™

Origanum โ€˜Kent Beautyโ€™: by Robert Pavlis

Origanum โ€˜Kent Beautyโ€™ is a wonderful little plant for the rock garden. It is not a show stopper, nor does it have big flashy flowers, but it does have a very unique look that gets people talking. It requires almost no care and has few pests.

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Spring Bulbs – When Is The Best Time To Plant?

Almost every gardener grows spring bulbs like tulips, daffodils, hyacinths and crocus. Millions of new bulbs are sold every year and yet people do not agree on the best time to plant them. Some want to plant early, as soon as they arrive in shops. Others say that you should wait until the ground gets an early frost. Some wait until the ground is fully frozen, but that is usually because they forgot to plant earlier.

A couple of years ago I was in a large nursery that specialized in spring bulbs. It was early September in a zone 5 climate and a manager told me not to plant the bulbs for a couple of months until we had a light frost. I looked him in the eye and asked about the bulbs I had planted in prior years – they were already in the ground. Do they need to be dug up so I could re-plant them after frost? He did not have an answer.

Lets have a look at the science and figure out when you should plant spring bulbs.

When is the best time to plant spring bulbs?
When is the best time to plant spring bulbs?

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Chives, Garlic Chives, Onion Chives, Garlic Scapes – Which One Do You have?

There is a lot of confusion out there about various chives and garlics. Identifying one from the other is actually quite simple, until we add other alliums to the list, then it can become very complicated. In this post I will look at the common ones and provide a simple way to correctly identify your plant. I’ll also include some cultural information.

Allium Globemaster in the authors garden, by Robert Pavlis
Allium Globemaster in the authors garden, by Robert Pavlis

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Allium thunbergii โ€˜Ozawa’

Allium thunbergii 'Ozawa', by Robert Pavlis

The last plant to start flowering in my zone 5 garden is ย Allium thunbergii โ€˜Ozawaโ€™, the Japanese onion. As I write this it is October 26, 2014 and we have not had a real hard frost yet which is very unusual. Most common fall flowering plants like mums are finished flowering but the Japanese onion is still going strong. It is not bothered by early frost or snow.

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Dictamnus albus

Dictamnus albus, by Robert Pavlis

Dictamnus albus, the gas plant, always makes a big splash in the garden when it is flowering and even when it is not flowering it is a very interesting plant with good leaf structure. ย Even the star-shaped seed heads are interesting. So why is this plant not seen more in gardens? It is very slow growing and I think it costs nurseries too much to get it to a saleable size. Fashions have also changed and this fantastic plant has been left behind in favor of more modern plants. That is a real shame since few garden plants will match the presence of a mature Dictamnus.

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Planting Perennials the Right Way

Planting perennials may seem easy but there is more to it than you realize. Planting correctly will ensure larger and healthier plants in the long term.

Acanthus hungaricus - planting perennials the right way, by Robert Pavlis
Acanthus hungaricus with 60 flower spikes – planting perennials the right way, by Robert Pavlis

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Growing Subshrubs Like Lavender and Russian Sage

Go into any nursery and try to find lavenderย and Russian sage; they will be in the perennialย section. Check these plants online or in books, and most sources will tell you they are perennials. Lavender and Russian sage are subshrubs, a fancy name for a small shrub. Once you understand they are NOT perennials, they become easy to grow.

Lavender - a common subshrub
Lavender – a common subshrub

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Do Houseplants Increase Oxygen Levels?

Indoor plants have a great reputation for purifying the air in our homes. In Air Purifying Plants – Do They Work?,ย  I debunked the idea that houseplants remove VOCs (toxic chemicals) from our home – it is just a well publicized myth. Several people commenting on that post and the post called A Garden Myth is Born – Plants Don’t Purify Air, to make the point that plants do more than remove chemicals – indoor plants increase oxygen levels in the air. This increased oxygen contributes a lot to our well being – or so people claim. Do houseplants increase oxygen levels in the home?

House plants don't increase oxygen levels in the home.
House plants don’t increase oxygen levels in the home.

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Walnuts, Juglone and Allelopathy

The common statement “nothing grows under walnut trees” is not true. “Walnuts produce juglone” is not entirely true either. “You need to compost walnut wood chips before using them in the garden” is false. “The allelopathic properties of walnuts are well understood” – not true.

This is a popular subject that is routinely discussed and written about, but the truth around walnut trees is anything but clear.

Black Walnut - Walnuts, Juglone and Allelopathy
Black Walnut – Walnuts, Juglone and Allelopathy

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