It depends upon the particular cactus. For example, the old man cactus [Cephalocereus senilis] reaches a mature height of 50 feet/15 meters. It may mature to an age of around 200 years. It's slow growing. So it doesn't flower the first 20 years of its existence.
The length of time of the flowering depends upon the particular cactus. Cactus plants need moisture in order to flower. That's why cactus plants tend to burst into bloom after one of the rare desert rain events. The bloom may last a day, a night, or a couple of days. And sometimes it may not happen at all even under the best of circumstances. In fact, it's one of the perilous possibilities of container grown cactus plants.
No, it blooms every season as long as it is healthy and has good growing conditions.
Most bloom only once per year but a few may bloom more than once. It depends on the particular species.
in summer I think
every April
the sun
The Prickly Pear Cactus
A prickly pear is a cactus. There is no commensalism or mutualism.
on a pear
No, a cactus is a plant, not an animal.
apricot prickly pear cactus
your nan
prickly pear
If you stuck your finger into a prickly pear cactus, you could get stuck with one of the spines. You could also possibly be bitten by a spider who likes to make their webs in the prickly pear.
yea it is vascular
me on aus
no
It is bisexual.