Native Plants
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Friday - August 11, 2006
From: Caribou, ME
Region: Northeast
Topic: Non-Natives
Title: Alternatives to non-native, invasive Pampa grass
Answered by: Joe Marcus
QUESTION:
Could you please tell me if Cortaderia Selloana is "zone 4" hardy? Also how to start Opuntia Humifusa from cuttings? Do I let them stand upright dry and with no soil until they form the callous? Please help! Thank You So Much! JanetANSWER:
Most references give USDA cold-hardiness zones 6 or 7 as the northern limit for Cortaderia selloana, Pampas grass. It might survive in your area if located in a protected spot, but it might be just as well for you if it won't. Many people who plant this South American native in their gardens end up regretting doing so because of its legendary aggressiveness - it tends to resist all efforts to control its relentless expansion.You might consider some native alternatives which would be perfectly suited to your climate and are much less likely to cause headaches later on. Some possibilities are Switchgrass, Panicum virgatum; Indiangrass, Sorghastrum nutans and Canada wild rye, Elymus canadensis. All are stately grasses native to Maine.
The cactus you are asking about, Opuntia humifusa, Eastern prickly-pear is not native to your area either, and will likely need winter protection. They are easy to propagate, though. Just let the wound caused by seperating the pads dry for a few days and then insert the severed end in evenly moist, well-drained media. It should root within a few weeks. Here is a link to a great web page on cactus propagation which goes into more detail.
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