I have some dried up olives from a tree here in a neighbor's yard, so they grow here - but can I grow one from seed, and any special how-to? Thanks.
Yes, you can grow olive trees from the seeds from your neighbor's tree. This article explains how:
https://www.gardeningknowhow.com/edible/fruits/olive/how-to-plant-olive-pits.htm
We have a olive tree in the garden which used to produce flowers and fruit, though not particularly abundant. However, about 4 or 5 years ago we had a severe winter -18 for a couple of weeks and the olive tree died as did the fig. We cut it down severely thinking to uproot it all together, but in the spring new shoots started to come from the ground around the original tree so we left them to grow and they have. It's now a lovely looking tree again BUT, we have had no flowers and therefore no fruit. Is it worth persisting with or should we replace it Thank you
Your tree was likely a grafted tree, so the root stock is unknown.
I believe you would have seen flowers and fruit by this time if it was going to produce.
If your goal is a Olive Tree that will produce, you may want to move on to a new tree.
https://www.gardeningknowhow.com/edible/fruits/olive/olive-tree-care-information.htm
We have a large 15 foot tall olive tree that is planted in the ground in the lobby of our business. For the first few months it was doing great but recently it's been losing leaves. The first couple inches of the soil are dry but our meter is reading 10/10 or very wet about 8 inches down. We have 2 grow lights that run for 5 hours at night that are about 10 feet from the tree. There is a large 10'X10' skylight directly about the tree. The leaves have been falling off and drying out but there is still new growth on the top and a small amount on one side. Thoughts?
It sounds like the soil has poor drainage and this would correlate with the stress that the Olive Tree seems to be presenting.
How is excess moisture draining from this planting area?
Root Rot is a real possibility unless the tree has adequate drainage.
https://www.gardeningknowhow.com/edible/fruits/olive/olive-tree-care-information.htm
http://www.oliveoilsource.com/page/disease-control
The olive tree gets blooms in early spring but no fruit
The question is if you have a sterile variety of olive tree. Through the years horticulturalists have developed varieties that don't fruit so they are less messy. Do you know if this is a fruiting variety?
Can you please tell us when to pick the black olives? We did not realise there was any fruit on the tree as it had only fruited once before - about 14 years ago. Now we notice there are hundreds of shrivelled olives - are they not yet ready or are they over ripe?
Unlike many other fruits, the different colors that olives come in are due to the ripeness of the fruit, not the variety. Most olives are ready to harvest when the juice turns cloudy, at the “green ripe” stage in late September. They ripen to an uneven reddish-brown through November, finally darkening to the “naturally black ripe” stage by early December. Olives in this stage have a high oil content and are easily bruised. If harvested for eating they need to be handled with care; handpicking is essential as damaged fruit will usually not survive the curing process.
https://www.gardeningknowhow.com/edible/fruits/olive/harvesting-olive-trees.htm
I require an image of how olive tree roots grow. I understand they grow just below the surface of the earth, I need an image of how the root system spreads. Thanks
I found this link for you.
http://ediblemarinandwinecountry.ediblecommunities.com/things-do/plant-olive-tree
https://www.gardeningknowhow.com/edible/fruits/olive/olive-tree-care-information.htm
I have an Arbequina olive that I put in a pot last year when I received it. Since I live in Northeast Ohio: this past winter I moved it to the basement and put it under grow lights for approximately 14 hours a day. The existing leaves fell off and I started to develop new branches up at the top by the lights. In the spring I moved the potted tree out to the sunniest and warmest part of my yard. I have the same branches as in the basement, but I do not see and new leaves coming out. Am I wasting my time or do I need to have more patients with this tree?
Check the branches; do the bend or snap off?
If they break off, they have died. You can prune off any dead branches and wait to see if you get any new growth from the roots.
https://www.gardeningknowhow.com/edible/fruits/olive/growing-olive-trees-in-containers.htm