REDU format ruling
Miracle Fertilizer

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)Once per turn: You can target 1 Plant monster in your GY; Special Summon that target. You cannot Normal Summon/Set during the turn you Special Summon with this effect (even if this card leaves the field). If a monster Special Summoned by this effect leaves the field, destroy this card.
Rulings
- Miracle Fertilizer targets the monster(s) Special Summoned by its effect, both when it is selected in the GY and while it is on the field. If Miracle Fertilizer is returned to its owner's hand, any monster(s) that was Special Summoned by its effect is no longer targeted, even if Miracle Fertilizer is activated again later.
- If you Special Summon a monster with Miracle Fertilizer, and later in the same turn Miracle Fertilizer is removed from the field, you still cannot Normal Summon or Set a monster that turn.
- If you Special Summon 2 or more monsters with Miracle Fertilizer, when any of the Special Summoned monsters is removed from the field, Miracle Fertilizer is destroyed.
- If you activate the effect of Miracle Fertilizer and an effect is chained that removes the targeted Plant-Type monster from play, you can still Normal Summon or Set during that turn.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.