Glad to see N. sp. viking grows well for you. The ones I have here flower for me short, Less than 2' in plant height. These should be good for breeding like N. ventracosa. Alot of variety in the plant. I could find dozens of variations at the market and for what 50 baht a plant! [ a little over $1.00!]. With limits on US importing via carry on I'll have to make multiple trips.