Activate this card by Tributing 1 Level 2 or lower Plant-Type monster; Special Summon 1 Plant-Type monster from your hand or Deck whose Level is less than or equal to the Level the Tributed monster had on the field +3. When this card leaves the field, destroy that monster. When that monster leaves the field, destroy this card.
This card is released when plants are quite relevant in the meta. Komushroomo is arguably a key card in a Sylvan deck since it can excavate up to 5 cards, and since it's a level 2 plant type monster, it can be used Super Solar Nutrient to summon a level 5 or 4 Sylvan monster after you flip it face up. This way it won't leave him face up in attack position with only 100 attack. Several copies of Jasmine is also used in an Aromage deck along with Rose Lover. They have various effects that benefit from gaining LP and has Aromage Bergamot for a high attack plant monster with a piercing effect.
Tributes for cost
Destroys itself / Destroys your Monster Cards
Special Summons from your hand / Special Summons from your Deck
You get a free search and special summon on a level 4 or below monster. For aromage for instance, you can tribute your rose lover to search Jasmine and instantly put it on the field in face up defence.
Being able to turn a Rose Lover into a Level 4 of your choice seems worthwhile to me. Granted, there aren't a lot of Level 5 or lower Plants that need it right now, but still. Also, in a 20-card format, 3 of this and the card you want makes you very, VERY likely to open that monster.