The Clematis cartmanii are all evergreen types from New Zealand, they have whispy foliage that in most cases does not cling very well ( as they dont all form tendrils). Cultivars vary in height/size from just 3 feet to 8 feet, and always flower in the spring, with some forming seed heads after the flowers have gone.
Early sensation, Joe or Avalanche® 'Blavaal' are among the most popular cultivars.
Sowing & planting
100 - 250
6 - 7
Plant my clematis cartmanii
The clematis appreciates to have its head in the sun and its foot in the shade, facing South or West.
Plant in late autumn or winter, in unfrozen soil, during the dormancy of the plant. Plant in a hole at least twice as big as the root ball. Soak the roots in water before planting, it should improve the chances of recovery.
Keep a hollow around the base, it will serve as a water reserve during the first months. Tamp the soil well around the roots (do not hesitate to use all your bodyweight).
Water until the hollow is full, and the level decreases very slowly (at least two watering cans). Clematis prefers to have shade at their base, shelter it with a flat tile
Also cover the base with a small mound of soil, which will promote the emission of shoots from the stump.
Provide the clematis with a small support pole to bring it to its final support. Clematis easily reaches 5 m despite a regular trimming, so use a sturdy support.
Water my clematis cartmanii
Water twice a week if you have planted early in season during the first month, and possibly all summer in case of drought.
Some varieties bloom very early, in this case they do not need watering during flowering - but as early as May, watering can be useful.
Water copiously but infrequently to encourage the root system to seek water deep underground. It's therefore suitable to water until the planting basin is full and only empties slowly.
Prune my clematis cartmanii
Most cultivars grow quite slowly and do not really require pruning. Just a 'soft' pruning right after flowering will do : remove dead or damaged stems, and shorten others if necessary, to encourage branching.
Trellise my clematis cartmanii
If the new stems aren't twisting and attaching to the support by themselves or if the plant "collapses", rehang them.
Mulch my clematis cartmanii
Mulch the clematis to limit the challenge of "weeds", and evaporation. Spraying a layer of 5-10 cm mulch of bark or wood is recommended.
Fertilize my clematis cartmanii
Mulch you clematis with compost or well-decomposed manure in February or March.