Penelitian ini bermaksud untuk menjawab pertanyaan terkait bagaimanakah respon perkecambahan dan pertumbuhan tanaman seledri (Apium graveolens L.) terhadap perlakuan H2SO4 yang diberikan. Rancangan penelitian yang digunakan adalah RAK dengan pola satu faktor yaitu faktor pengaruh waktu perendaman benih didalam larutan H2SO4 konsentrasi 24% dengan 6 taraf perlakuan. P0 = Tanpa perendaman, P1=Aquades, P2= Perendaman 5 menit, P3= Perendaman 10 menit, P4= Perendaman 15 menit, P5= Perendaman 20 menit. Selanjutnya hasil pengamatan dianalisis menggunakan analisis sidik ragam taraf 5% dan apabila terdapat pengaruh nyata akan dilanjutkan dengan uji DMRT. Hasil dari penelitian ini penulis menyimpulkan bahwa; perlakuan perendaman menggunakan H2SO4 menghasilkan nilai yang berbeda nyata terhadap potensi tumbuh maksimum, daya berkecambah, kecepatan tumbuh, indeks vigor dan jumlah daun 2 MST. Akan tetapi berbeda tidak nyata terhadap tinggi tanaman 2 MST, 4 MST, 6 MST dan jumlah daun 4 MST dan 6 MST. Lama perendaman benih didalam larutan asam sulfat dengan konsentrasi 24% memberikan hasil tertinggi pada perlakuan P4 yaitu perendaman selama 15 menit, pada parameter Potensi Tumbuh Maksimum (PTM) 100%, Daya Berkecambah (DB) 98%, Kecepatan Tumbuh (KCT) 25,28% , Indeks Vigor (IV) 98%, dan jumlah daun 2 MST 8,50 (P3). Perlakuan lama perendaman asam sulfat pada semua perlakuan cenderung memberikan hasil tertinggi terhadap parameter tinggi tanaman (2 MST 3,30 cm), 4 MST (5,20 cm), 6 MST (7,25 cm ) dan jumlah daun 4 MST (11,75 helai) dan 6 MST (14,50 helai).
Kata kunci: H2SO4 Konsentrasi 24 %, Seledri, Waktu Perendaman

This study animed at answering questions related to how the germination and growth of celery (Apium graveolens L.) responded to the H2SO4 treatment given. The research used randomized block designed with one factor pattern, namely the effect of the time of seed soaking in a H2SO4 solution of 24% concentration with 6 levels of treatment. P0 = No immersion, P1 = Aquades, P2 = Immersion for 5 minutes, P2 = Immersion for 10 minutes, P2 = Immersion for 15 minutes, P2 = Immersion for 20 minutes. Futhermore, the observation were analyzed using analysis of variance of 5% level and when there was a real influence, it was followed by the DMRT test. The results showed that the immersion treatment using H2SO4 produced significantly different values for maximum growth potential, germination power, growth speed, vigor index, and number of leaves of 2 weeks after planting (WAP). However, there wa no significant different for plant height of 2 WAP, 4 WAP, 6 WAP and leaf number 4 WAP and 6 WAP. Soaking time of seed in sulfuric acid solution with a concentration of 24% gave the highest result in the P4 treatment that is immersion for 15 minutes, on the parameters of the Maximum Growth Potential (MGP) 100%, Germination Power (GP) 98%, Growth Speed (GS) 25,28 %, Vigor Index (VI) 98%, and number of leaves 2 WAP 8,50 (P3). Sulfuric acid immersion length treatment in all treatments tended to give the highest yield of plant height parameters (2 WAP 3 30 cm), 4 WAP (5,20 cm), 6 WAP (7,25 cm) and leaf number 4 WAP (11,75 strands) and 6 WAP (14,50 strands). Keywords: H2SO4 24% Concentration, Celery, Soaking Time