How many clematis to buy

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I have had an ugly Leylandii hedge cut down to waist height and want to plant clematis to cover the remains. I wonder if you could suggest how many plants to cover about 35 feet in length, please?

hi wendy the average spread of the average clematis is about 1 metre so that would mean about 10 plants however you could cover it all with just 2 of the Montana types but they only flower in may where as the others tend to flower for about 3-4 months (so horses for courses) hope this helps

Clematis – Montana

Chris and Suzy