>>998046No. This is a deflector. It keeps the grass out of the wind.
If the mower does not throw grass out and instead mulches it, you don't need a deflector. However, mulching it with the mower causes an extreme amount of allergens to be released into the air by the entire lawn.
>>998050Sage needs well draining soil. It like medium to full sun. Hold back on fertilizer because it will decrease the flavor. Remember it originally came from the Mediterranean.
>>998146Trifolium repens commonly has up to 5 petals. It is probably just that.