Plants with low allergenicity

Considering that the use of plants with low allergenicity in the organization of urban green spaces (parks, boulevards and street sides), gardens and apartments can control and reduce the incidence of allergic diseases such as seasonal allergies or asthma. Therefore, in the last decade, a researcher named Thomas Ogren has introduced a system called OPALS for rating the severity of allergenicity of plants.   
Some species of plants suitable for green spaces and apartments that have very low allergenicity:

Begonia plant, narcissus flower, enamel flower, geranium plant, hosta plant, henna flower, lily flower, lily flower, violet flower, telegraph flower, petunia flower, phlox plant, sage plant, monkey flower, sunflower flower, tulip flower

St. Augustine’s Lawn

Azalea, lace plant, hydrangea flower, marshmallow flower, Erica palm, Rapis palm, bamboo palm, Drasna plant species

Red maple tree, plum tree, pomegranate tree, persimmon tree, pear tree, magnolia, red elm tree or shaft tree (from blueberry)
trees suitable for the southern part of the country (tropical areas): paper flower shrub, Ahwazi boxwood shrub (Clerodendrum inerme) ), the side tree (cedar) or the female species of palm trees.