Egyptian Mint is a perennial but quality wanes in older specimens which should be replaced every 3 to 5 years.
Although it is possible to grow mint from seeds, it is not advisable, success rate is low and frustration levels high. It is so much easier to grow via cuttings or root divisions if you do not have access to a plant. If you do not have access, Egyptian mint is sometimes difficult to locate but can be found at online nurseries.
Egyptian mint is neither drought or frost tolerant and fades rapidly in temperature fluctuations and should be kept well watered. It will grow in full sun, however if you live in a hot region partial shade is best. It is also not drought tolerant so should be kept well watered. It will survive some dry spells, but not too often.
Mint varieties when grown close to one another have a tendency to cross pollinate. This end result is usually undesirable so it is advisable to keep various mint varieties a safe distance from one another.
Mint is invasive and will spread prolifically if left unchecked. Egyptian mint is on the low end of the bell curve so far as invasive spread is concerned. It still has a tendency to spread to where it is not wanted but not so much as other varieties.
Keep the plants in check by harvesting the tips on a regular basis and removing renegade runners. Small flowers bloom from June to September, you should trim these before the buds open to keep the plant compact and manageable.
Another method of controlling mint plant is using bottomless containers 12 - 15 inches in depth and sunk in the ground with one or two inches protruding above the soil surface. Another is to plant them above ground in containers.
A layer of mulch in the Autumn will help protect them in their winter dormancy.
Fertilizer is not necessary so long as the soil is reasonably fertile, not sand and certainly not clay. If your soil is abysmal Modest amounts of fertilizer can't hurt. Fertilize in early Spring and then every fifth week thereafter with a balanced fertilizer. No more than 3 X per season and in Modest amounts.