>>10752546 to 8 weeks before your first hard frost
>>10752501: If you stick your finger into the soil and the moisture content seems correct then your cucumber plants probably need magnesium. The fastest way to give them that is using a foliar spray. It is a very common problem with cucumbers. Otherwise, use some compost tea or manure tea when you water normally.
2: I saved seeds from one of mine last night. I let it grow as large as possible. I took the knife and cut length-ways into the flesh just about a centimeter. I did that on both sides. I did not cut all the way into it. Then I was able to pull the two halves apart (I do the same thing with water melon when saving seeds.) I use a spoon to scoop all the seeds out. I put them in a big bowl/stock pot of water and rinse them several times, getting those clear sacks off their outsides. Then I hose them out well in a strainer, put them on a towel, fold the towel over them, press down firmly and swipe the towel against itself to help remove any goop still left on them. Then I flake the seeds off on a plate to dry for several days. When you touch the seeds a few days from now they should not feel cool to the touch. If they feel cool in any way it means they are still too moist for storage. I store mine in paper envelopes (they get labeled and a tiny picture drawn of what the fruit/veggie looks like). You can't use plastic bags if the seeds are still too moist or they will mold over. Regardless of what you use, you will need to store the envelopes/bags in a metal or glass container to prevent pests from chewing into them and eating everything.
3: They are most likely splitting due to inconsistent watering. Like you had several days of hot sunny weather without rain or watering. Then you got a huge downpour of a storm or you watered heavily. That will cause them to split like crazy. Some cultivars are better at not splitting than others.
>>1075286They are a Brazilian tree. You'd need to get seeds from overseas.