Acu wrote:Hey KT, I can't speak on quantity of seeds as the only time I grew morning glory I moved out of the house before it produced any seeds but have you compared the properties of MG's with HBWR? As you need way less seeds for them, so could be worth a look if LSA's your main goal?
HBWR and Tricolor both get absolutely massive, my nervosa had sections of vine that were probably 30 feet long and my tricolor took over a couple medium size fruit trees and choked out an herb bed in one season. Growing these indoors for seeds is probably not a great idea unless you can devote a HELL of a lot of room for them. You can trim them back, but you're not going to get many flowers on them like that. 60X60X180 (cm) just isn't enough room in my experience for either of these two to make it worthwhile. Outdoors, if the tricolor gets any size to it, it will rain seeds in a multitude as long as it has time to flower and go to seed before cold weather, lower than the mid 40's F is bad news.
Also just a side note, keep your HBWR warm, if it hits below a certain temperature it won't flower. Had mine for six years and it never flowered, and finally got to talking to a professional and was told that it was likely due to a lower temperature exposure, some tropicals will not flower for the year if they detect lower temps.
Hate to be a bummer, but they are both huge vining plants that need a lot of space, for example, my HBWR had some leaves on it that were the size of my chest and unless you can get them outside the tricolor just isn't going to make enough flowers to fool with in a small area like that.
Edit: If you decide to do it anyway, your only chance of getting enough flowers to make it worthwhile in a small space is likely going to be pruning the crap out of it, and I would top every second or every other node and snip one leaf at each node to force it into shorter nodal lengths. Doing it this way is going to take a great deal of time though as it will significantly slow the growth rate and with vining plants it's still going to need that leg room. I've also read somewhere that the LSA content in Ipomea is from the fungi in the soil, don't know if it will make a difference with the soil medium or not but something to think about as well.
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