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Month: September 2022

Cercospora Leaf Spot – Prevention and Treatment

Cercospora Leaf Spot – Prevention and Treatment

What is Cercospora Leaf Spot? Cercospora Leaf Spot is a fungal disease that’s not fatal. However it does spread quickly and seems to be more of a problem in shady positions. I have personally noticed the disease quite frequently on hydrangeas including the smooth, panicle, oakleaf and bigleaf types of hydrangea. How to recognise Cercospora Leaf Spot? This disease first appears on the underside of older leaves as irregular brown spots that might have halos around them. You may also…

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Phytophthora Root Rot – prevention and treatment

Phytophthora Root Rot – prevention and treatment

What is Phytophthora Root Rot? Phytophthora Root Rot is a fungal disease that spreads through the soil but there are several different types. Unfortunately, it’s actually more common than you might think, but it’s often mistaken for honey fungus as this also causes similar symtoms above the soil such as wilting and yellow/brown foliage. The issue arises as it is commonly associated with wet and water-logged soils. This on its own also causes similar symptoms as it causes the roots…

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Growing Wisteria frutescens ‘Amethyst Falls’

Growing Wisteria frutescens ‘Amethyst Falls’

Wisteria Amethyst Falls is a dwarf cultivar of wisteria and far less vigorous that the Chinese and Japanese varieties commonly sold in garden centres and nurseries. I personally grow Amethyst Falls in pots as it’s perfect for this as is such a compact variety. That being said, it grows up to 5m tall and 3m wide. Its blooms on strings of racemes grow down from vines in masses of blue-lilac flowers from late spring through to mid-summer. You can tell…

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Wisteria pests and diseases to watch out for

Wisteria pests and diseases to watch out for

Wisteria is generaly a problem free climbers with lack of flowers being the usually compliant or wilting and yellowing leaves, but like all plants, there are a few wisteria pests and diseases to watch out for. But as some of these cause the plant to not flower or to dieback they can’t be ignored. Here’s how to identify what’s wrong with your wisteria and what to do about it. Wisteria pests Scale insects Scale insects were first found in Britain…

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Why is my wisteria not blooming? 7 Reasons

Why is my wisteria not blooming? 7 Reasons

There are quite a few reasons your wisteria may not be blooming, from the type of plant itself through its location and growing conditions to how you’re treating it. A couple of the most common reasons are you have pruned it incorrectly and removed the flowering shoots. Too much nitrogen in the soil can also be an issue, as well as feeding them too much. Ideally, you should feed them phosphate fertilizer to encourage flowering. To learn more about these…

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How to prune wisteria (why, when and how)

How to prune wisteria (why, when and how)

Wisteria is not a difficult plant to prune but its important its done correct or it can lead to wisterias not blooming as discussed in this guide. With this fast-growing climber, you do have to establish a pruning schedule and be sure to prune at the right times twice a year. Here’s how to do that and be rewarded with a wonderful display of blooms. Deadhead wisteria Though not technically a form of pruning, deadheading is the task of removing…

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Growing wisteria climbers in pots and containers

Growing wisteria climbers in pots and containers

Growing wisteria in pots and containers is a bit tricky if you choose one of the more vigorous varieties of wisteria. However, I like to plant compact varieties such as Wisteria ‘Amethyst Falls’ as these will grow better in pots as they are naturally less vigorous. That being said, you can still grow other large varieties such as Wisteria sinensis and Wisteria floribunda. Wisterias grown in pots are great when grown as a standard (small tree), but you can still grow them…

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Wisteria problems and what to do about them

Wisteria problems and what to do about them

Wisteria problems such as graft failure and root diseases such as honey fungus and Phytophthora root rot are either biological (pests and diseases), environmental (sun, location, etc.) or due to your care such as incorrect pruning results in no flowers. In this guide, I share my experience with all of these here and give advice on what to do about each of them. Specific problems I’ve already addressed specific problems in Why is my wisteria not blooming? and Why are my wisteria leaves…

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Will wisteria damage my house?

Will wisteria damage my house?

Without proper care, wisteria can damage your house or whatever they’re growing up, but it’s more likely they won’t if managed correctly. Wisteria are strong, fast-growing climbing plants with substantial stems and roots. These huge and heavy climbing plants can live for many many years, in other words, they will outlast most of us, including myself. Many older houses have huge wisteria climbing their outer walls, and they look stunning and create the most amazing shows when in flower. The…

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Why are my wisteria leaves turning yellow or wilting?

Why are my wisteria leaves turning yellow or wilting?

Along with some pests and diseases, there are a few other problems that might be the cause of your wisteria leaves turning yellow or wilting. Common ones include honey fungus and Phytophthora root rot which are both root diseases. Waterlogging can also lead to root rot that can cause both wilting and yellowing of the leaves. Another one I have personally had issues with when growing wisteria in pots is vine weevil, as their larvae feed on the roots. Finally,…

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